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Finding the Fourth Proportional to 407.38, 562.05 and 230.32

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Solution

The fourth proportional to 407.38, 562.05 and 230.32 is: 317.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.38 : 562.05 = 230.32 : x
  2. Step 2: Convert to fraction form
    407.38/562.05 = 230.32/x
  3. Step 3: Cross multiply
    407.38x = 562.05 × 230.32
  4. Step 4: Simplify right side
    407.38x = 129,450.20
  5. Step 5: Solve for x
    x = 129,450.20/407.38
  6. Step 6: Final answer
    x = 317.76

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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.