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Finding the Fourth Proportional to 438,072.80, 657,104.88 and 138,553.28

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Solution

The fourth proportional to 438,072.80, 657,104.88 and 138,553.28 is: 207,828.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,072.80 : 657,104.88 = 138,553.28 : x
  2. Step 2: Convert to fraction form
    438,072.80/657,104.88 = 138,553.28/x
  3. Step 3: Cross multiply
    438,072.80x = 657,104.88 × 138,553.28
  4. Step 4: Simplify right side
    438,072.80x = 91,044,036,428.01
  5. Step 5: Solve for x
    x = 91,044,036,428.01/438,072.80
  6. Step 6: Final answer
    x = 207,828.55

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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.