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Finding the Fourth Proportional to 602.72, 905.61 and 487.38

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Solution

The fourth proportional to 602.72, 905.61 and 487.38 is: 732.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.72 : 905.61 = 487.38 : x
  2. Step 2: Convert to fraction form
    602.72/905.61 = 487.38/x
  3. Step 3: Cross multiply
    602.72x = 905.61 × 487.38
  4. Step 4: Simplify right side
    602.72x = 441,376.20
  5. Step 5: Solve for x
    x = 441,376.20/602.72
  6. Step 6: Final answer
    x = 732.31

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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.