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Finding the Fourth Proportional to 674.33, 929.48 and 487.55

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Solution

The fourth proportional to 674.33, 929.48 and 487.55 is: 672.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.33 : 929.48 = 487.55 : x
  2. Step 2: Convert to fraction form
    674.33/929.48 = 487.55/x
  3. Step 3: Cross multiply
    674.33x = 929.48 × 487.55
  4. Step 4: Simplify right side
    674.33x = 453,167.86
  5. Step 5: Solve for x
    x = 453,167.86/674.33
  6. Step 6: Final answer
    x = 672.03

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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.