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Finding the Fourth Proportional to 657,806.40, 907,772.88 and 356,000.40

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Solution

The fourth proportional to 657,806.40, 907,772.88 and 356,000.40 is: 491,280.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,806.40 : 907,772.88 = 356,000.40 : x
  2. Step 2: Convert to fraction form
    657,806.40/907,772.88 = 356,000.40/x
  3. Step 3: Cross multiply
    657,806.40x = 907,772.88 × 356,000.40
  4. Step 4: Simplify right side
    657,806.40x = 323,167,508,389.15
  5. Step 5: Solve for x
    x = 323,167,508,389.15/657,806.40
  6. Step 6: Final answer
    x = 491,280.58

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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.