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Finding the Fourth Proportional to 966.46, 1,449.91 and 418.73

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Solution

The fourth proportional to 966.46, 1,449.91 and 418.73 is: 628.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.46 : 1,449.91 = 418.73 : x
  2. Step 2: Convert to fraction form
    966.46/1,449.91 = 418.73/x
  3. Step 3: Cross multiply
    966.46x = 1,449.91 × 418.73
  4. Step 4: Simplify right side
    966.46x = 607,120.81
  5. Step 5: Solve for x
    x = 607,120.81/966.46
  6. Step 6: Final answer
    x = 628.19

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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.