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Finding the Fourth Proportional to 868,656,769.72, 1,198,747,114.64 and 472,179,759.28

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Solution

The fourth proportional to 868,656,769.72, 1,198,747,114.64 and 472,179,759.28 is: 651,608,487.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,656,769.72 : 1,198,747,114.64 = 472,179,759.28 : x
  2. Step 2: Convert to fraction form
    868,656,769.72/1,198,747,114.64 = 472,179,759.28/x
  3. Step 3: Cross multiply
    868,656,769.72x = 1,198,747,114.64 × 472,179,759.28
  4. Step 4: Simplify right side
    868,656,769.72x = 566,024,124,027,390,400
  5. Step 5: Solve for x
    x = 566,024,124,027,390,400/868,656,769.72
  6. Step 6: Final answer
    x = 651,608,487.68

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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.