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Finding the Fourth Proportional to 438,045.90, 657,149.97 and 138,601.86

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Solution

The fourth proportional to 438,045.90, 657,149.97 and 138,601.86 is: 207,928.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,045.90 : 657,149.97 = 138,601.86 : x
  2. Step 2: Convert to fraction form
    438,045.90/657,149.97 = 138,601.86/x
  3. Step 3: Cross multiply
    438,045.90x = 657,149.97 × 138,601.86
  4. Step 4: Simplify right side
    438,045.90x = 91,082,208,140.94
  5. Step 5: Solve for x
    x = 91,082,208,140.94/438,045.90
  6. Step 6: Final answer
    x = 207,928.46

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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.