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Finding the Fourth Proportional to 456.87, 630.68 and 282.45

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Solution

The fourth proportional to 456.87, 630.68 and 282.45 is: 389.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.87 : 630.68 = 282.45 : x
  2. Step 2: Convert to fraction form
    456.87/630.68 = 282.45/x
  3. Step 3: Cross multiply
    456.87x = 630.68 × 282.45
  4. Step 4: Simplify right side
    456.87x = 178,134.15
  5. Step 5: Solve for x
    x = 178,134.15/456.87
  6. Step 6: Final answer
    x = 389.90

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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.