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Finding the Fourth Proportional to 438,003.65, 657,001.33 and 138,484.28

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Solution

The fourth proportional to 438,003.65, 657,001.33 and 138,484.28 is: 207,725.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,003.65 : 657,001.33 = 138,484.28 : x
  2. Step 2: Convert to fraction form
    438,003.65/657,001.33 = 138,484.28/x
  3. Step 3: Cross multiply
    438,003.65x = 657,001.33 × 138,484.28
  4. Step 4: Simplify right side
    438,003.65x = 90,984,357,440.39
  5. Step 5: Solve for x
    x = 90,984,357,440.39/438,003.65
  6. Step 6: Final answer
    x = 207,725.11

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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.