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Finding the Fourth Proportional to 966.24, 1,449.72 and 479.64

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Solution

The fourth proportional to 966.24, 1,449.72 and 479.64 is: 719.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.24 : 1,449.72 = 479.64 : x
  2. Step 2: Convert to fraction form
    966.24/1,449.72 = 479.64/x
  3. Step 3: Cross multiply
    966.24x = 1,449.72 × 479.64
  4. Step 4: Simplify right side
    966.24x = 695,343.70
  5. Step 5: Solve for x
    x = 695,343.70/966.24
  6. Step 6: Final answer
    x = 719.64

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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.