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Finding the Fourth Proportional to 657,569.70, 985,807.80 and 278,781.30

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Solution

The fourth proportional to 657,569.70, 985,807.80 and 278,781.30 is: 417,940.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,569.70 : 985,807.80 = 278,781.30 : x
  2. Step 2: Convert to fraction form
    657,569.70/985,807.80 = 278,781.30/x
  3. Step 3: Cross multiply
    657,569.70x = 985,807.80 × 278,781.30
  4. Step 4: Simplify right side
    657,569.70x = 274,824,780,034.14
  5. Step 5: Solve for x
    x = 274,824,780,034.14/657,569.70
  6. Step 6: Final answer
    x = 417,940.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.