Home / 1,218,032,630.70-1,680,840,021.18-661,103,720.34

Finding the Fourth Proportional to 1,218,032,630.70, 1,680,840,021.18 and 661,103,720.34

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Solution

The fourth proportional to 1,218,032,630.70, 1,680,840,021.18 and 661,103,720.34 is: 912,298,704.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,032,630.70 : 1,680,840,021.18 = 661,103,720.34 : x
  2. Step 2: Convert to fraction form
    1,218,032,630.70/1,680,840,021.18 = 661,103,720.34/x
  3. Step 3: Cross multiply
    1,218,032,630.70x = 1,680,840,021.18 × 661,103,720.34
  4. Step 4: Simplify right side
    1,218,032,630.70x = 1,111,209,591,298,462,464
  5. Step 5: Solve for x
    x = 1,111,209,591,298,462,464/1,218,032,630.70
  6. Step 6: Final answer
    x = 912,298,704.72

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Double scale
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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.