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Finding the Fourth Proportional to 408, 562.14 and 397.20

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Solution

The fourth proportional to 408, 562.14 and 397.20 is: 547.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    408 : 562.14 = 397.20 : x
  2. Step 2: Convert to fraction form
    408/562.14 = 397.20/x
  3. Step 3: Cross multiply
    408x = 562.14 × 397.20
  4. Step 4: Simplify right side
    408x = 223,282.01
  5. Step 5: Solve for x
    x = 223,282.01/408
  6. Step 6: Final answer
    x = 547.26

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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.