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Finding the Fourth Proportional to 438,267.72, 657,500.10 and 138,766.20

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Solution

The fourth proportional to 438,267.72, 657,500.10 and 138,766.20 is: 208,180.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,267.72 : 657,500.10 = 138,766.20 : x
  2. Step 2: Convert to fraction form
    438,267.72/657,500.10 = 138,766.20/x
  3. Step 3: Cross multiply
    438,267.72x = 657,500.10 × 138,766.20
  4. Step 4: Simplify right side
    438,267.72x = 91,238,790,376.62
  5. Step 5: Solve for x
    x = 91,238,790,376.62/438,267.72
  6. Step 6: Final answer
    x = 208,180.49

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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.