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Finding the Fourth Proportional to 408.07, 562.85 and 314.75

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Solution

The fourth proportional to 408.07, 562.85 and 314.75 is: 434.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.07 : 562.85 = 314.75 : x
  2. Step 2: Convert to fraction form
    408.07/562.85 = 314.75/x
  3. Step 3: Cross multiply
    408.07x = 562.85 × 314.75
  4. Step 4: Simplify right side
    408.07x = 177,158.05
  5. Step 5: Solve for x
    x = 177,158.05/408.07
  6. Step 6: Final answer
    x = 434.14

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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.