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Finding the Fourth Proportional to 425.57, 587.18 and 239.04

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Solution

The fourth proportional to 425.57, 587.18 and 239.04 is: 329.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.57 : 587.18 = 239.04 : x
  2. Step 2: Convert to fraction form
    425.57/587.18 = 239.04/x
  3. Step 3: Cross multiply
    425.57x = 587.18 × 239.04
  4. Step 4: Simplify right side
    425.57x = 140,360.10
  5. Step 5: Solve for x
    x = 140,360.10/425.57
  6. Step 6: Final answer
    x = 329.82

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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.