Home / 1,217,957,386.79-1,680,797,317.97-661,047,109.67

Finding the Fourth Proportional to 1,217,957,386.79, 1,680,797,317.97 and 661,047,109.67

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Solution

The fourth proportional to 1,217,957,386.79, 1,680,797,317.97 and 661,047,109.67 is: 912,253,762.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217,957,386.79 : 1,680,797,317.97 = 661,047,109.67 : x
  2. Step 2: Convert to fraction form
    1,217,957,386.79/1,680,797,317.97 = 661,047,109.67/x
  3. Step 3: Cross multiply
    1,217,957,386.79x = 1,680,797,317.97 × 661,047,109.67
  4. Step 4: Simplify right side
    1,217,957,386.79x = 1,111,086,208,985,156,352
  5. Step 5: Solve for x
    x = 1,111,086,208,985,156,352/1,217,957,386.79
  6. Step 6: Final answer
    x = 912,253,762.76

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Double scale
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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.