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Finding the Fourth Proportional to 657,691.56, 907,616.76 and 355,885.56

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Solution

The fourth proportional to 657,691.56, 907,616.76 and 355,885.56 is: 491,123.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,691.56 : 907,616.76 = 355,885.56 : x
  2. Step 2: Convert to fraction form
    657,691.56/907,616.76 = 355,885.56/x
  3. Step 3: Cross multiply
    657,691.56x = 907,616.76 × 355,885.56
  4. Step 4: Simplify right side
    657,691.56x = 323,007,698,897.99
  5. Step 5: Solve for x
    x = 323,007,698,897.99/657,691.56
  6. Step 6: Final answer
    x = 491,123.38

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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.