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Finding the Fourth Proportional to 966.28, 1,449.48 and 479.20

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Solution

The fourth proportional to 966.28, 1,449.48 and 479.20 is: 718.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.28 : 1,449.48 = 479.20 : x
  2. Step 2: Convert to fraction form
    966.28/1,449.48 = 479.20/x
  3. Step 3: Cross multiply
    966.28x = 1,449.48 × 479.20
  4. Step 4: Simplify right side
    966.28x = 694,590.82
  5. Step 5: Solve for x
    x = 694,590.82/966.28
  6. Step 6: Final answer
    x = 718.83

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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.