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Finding the Fourth Proportional to 438,142.20, 657,213.30 and 248,529.30

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Solution

The fourth proportional to 438,142.20, 657,213.30 and 248,529.30 is: 372,793.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,142.20 : 657,213.30 = 248,529.30 : x
  2. Step 2: Convert to fraction form
    438,142.20/657,213.30 = 248,529.30/x
  3. Step 3: Cross multiply
    438,142.20x = 657,213.30 × 248,529.30
  4. Step 4: Simplify right side
    438,142.20x = 163,336,761,399.69
  5. Step 5: Solve for x
    x = 163,336,761,399.69/438,142.20
  6. Step 6: Final answer
    x = 372,793.95

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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.