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Finding the Fourth Proportional to 966.40, 1,450.31 and 479.59

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Solution

The fourth proportional to 966.40, 1,450.31 and 479.59 is: 719.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    966.40 : 1,450.31 = 479.59 : x
  2. Step 2: Convert to fraction form
    966.40/1,450.31 = 479.59/x
  3. Step 3: Cross multiply
    966.40x = 1,450.31 × 479.59
  4. Step 4: Simplify right side
    966.40x = 695,548.15
  5. Step 5: Solve for x
    x = 695,548.15/966.40
  6. Step 6: Final answer
    x = 719.73

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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.