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Finding the Fourth Proportional to 721.46, 994.96 and 472.69

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Solution

The fourth proportional to 721.46, 994.96 and 472.69 is: 651.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.46 : 994.96 = 472.69 : x
  2. Step 2: Convert to fraction form
    721.46/994.96 = 472.69/x
  3. Step 3: Cross multiply
    721.46x = 994.96 × 472.69
  4. Step 4: Simplify right side
    721.46x = 470,308.82
  5. Step 5: Solve for x
    x = 470,308.82/721.46
  6. Step 6: Final answer
    x = 651.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.