Home / 1,217,957,385.79-1,680,797,316.59-661,047,108.67

Finding the Fourth Proportional to 1,217,957,385.79, 1,680,797,316.59 and 661,047,108.67

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Solution

The fourth proportional to 1,217,957,385.79, 1,680,797,316.59 and 661,047,108.67 is: 912,253,761.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217,957,385.79 : 1,680,797,316.59 = 661,047,108.67 : x
  2. Step 2: Convert to fraction form
    1,217,957,385.79/1,680,797,316.59 = 661,047,108.67/x
  3. Step 3: Cross multiply
    1,217,957,385.79x = 1,680,797,316.59 × 661,047,108.67
  4. Step 4: Simplify right side
    1,217,957,385.79x = 1,111,086,206,392,114,048
  5. Step 5: Solve for x
    x = 1,111,086,206,392,114,048/1,217,957,385.79
  6. Step 6: Final answer
    x = 912,253,761.38

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Half scale
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Double scale
Find fourth proportional to 1,217,957,386.79, 1,680,797,317.97 and 661,047,109.67
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.