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Finding the Fourth Proportional to 438,069.75, 657,221.27 and 138,555.78

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Solution

The fourth proportional to 438,069.75, 657,221.27 and 138,555.78 is: 207,870.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,069.75 : 657,221.27 = 138,555.78 : x
  2. Step 2: Convert to fraction form
    438,069.75/657,221.27 = 138,555.78/x
  3. Step 3: Cross multiply
    438,069.75x = 657,221.27 × 138,555.78
  4. Step 4: Simplify right side
    438,069.75x = 91,061,805,004.66
  5. Step 5: Solve for x
    x = 91,061,805,004.66/438,069.75
  6. Step 6: Final answer
    x = 207,870.56

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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.