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Finding the Fourth Proportional to 456.97, 630.52 and 316.87

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Solution

The fourth proportional to 456.97, 630.52 and 316.87 is: 437.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.97 : 630.52 = 316.87 : x
  2. Step 2: Convert to fraction form
    456.97/630.52 = 316.87/x
  3. Step 3: Cross multiply
    456.97x = 630.52 × 316.87
  4. Step 4: Simplify right side
    456.97x = 199,792.87
  5. Step 5: Solve for x
    x = 199,792.87/456.97
  6. Step 6: Final answer
    x = 437.21

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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.