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Finding the Fourth Proportional to 438,478.08, 657,920.10 and 238,560.30

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Solution

The fourth proportional to 438,478.08, 657,920.10 and 238,560.30 is: 357,950.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,478.08 : 657,920.10 = 238,560.30 : x
  2. Step 2: Convert to fraction form
    438,478.08/657,920.10 = 238,560.30/x
  3. Step 3: Cross multiply
    438,478.08x = 657,920.10 × 238,560.30
  4. Step 4: Simplify right side
    438,478.08x = 156,953,616,432.03
  5. Step 5: Solve for x
    x = 156,953,616,432.03/438,478.08
  6. Step 6: Final answer
    x = 357,950.88

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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.