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Finding the Fourth Proportional to 657,921.60, 907,931.70 and 356,115.60

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Solution

The fourth proportional to 657,921.60, 907,931.70 and 356,115.60 is: 491,439.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,921.60 : 907,931.70 = 356,115.60 : x
  2. Step 2: Convert to fraction form
    657,921.60/907,931.70 = 356,115.60/x
  3. Step 3: Cross multiply
    657,921.60x = 907,931.70 × 356,115.60
  4. Step 4: Simplify right side
    657,921.60x = 323,328,642,104.52
  5. Step 5: Solve for x
    x = 323,328,642,104.52/657,921.60
  6. Step 6: Final answer
    x = 491,439.47

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.