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Finding the Fourth Proportional to 658.73, 909.28 and 639.29

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Solution

The fourth proportional to 658.73, 909.28 and 639.29 is: 882.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.73 : 909.28 = 639.29 : x
  2. Step 2: Convert to fraction form
    658.73/909.28 = 639.29/x
  3. Step 3: Cross multiply
    658.73x = 909.28 × 639.29
  4. Step 4: Simplify right side
    658.73x = 581,293.09
  5. Step 5: Solve for x
    x = 581,293.09/658.73
  6. Step 6: Final answer
    x = 882.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.