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Finding the Fourth Proportional to 474.73, 655.17 and 288.28

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Solution

The fourth proportional to 474.73, 655.17 and 288.28 is: 397.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.73 : 655.17 = 288.28 : x
  2. Step 2: Convert to fraction form
    474.73/655.17 = 288.28/x
  3. Step 3: Cross multiply
    474.73x = 655.17 × 288.28
  4. Step 4: Simplify right side
    474.73x = 188,869.13
  5. Step 5: Solve for x
    x = 188,869.13/474.73
  6. Step 6: Final answer
    x = 397.85

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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.