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Finding the Fourth Proportional to 644, 966.32 and 480.96

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Solution

The fourth proportional to 644, 966.32 and 480.96 is: 721.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    644 : 966.32 = 480.96 : x
  2. Step 2: Convert to fraction form
    644/966.32 = 480.96/x
  3. Step 3: Cross multiply
    644x = 966.32 × 480.96
  4. Step 4: Simplify right side
    644x = 464,761.27
  5. Step 5: Solve for x
    x = 464,761.27/644
  6. Step 6: Final answer
    x = 721.68

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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.