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Finding the Fourth Proportional to 487.73, 673.25 and 331.17

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Solution

The fourth proportional to 487.73, 673.25 and 331.17 is: 457.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.73 : 673.25 = 331.17 : x
  2. Step 2: Convert to fraction form
    487.73/673.25 = 331.17/x
  3. Step 3: Cross multiply
    487.73x = 673.25 × 331.17
  4. Step 4: Simplify right side
    487.73x = 222,962.71
  5. Step 5: Solve for x
    x = 222,962.71/487.73
  6. Step 6: Final answer
    x = 457.14

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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.