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Finding the Fourth Proportional to 425.62, 587.28 and 239.08

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Solution

The fourth proportional to 425.62, 587.28 and 239.08 is: 329.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.62 : 587.28 = 239.08 : x
  2. Step 2: Convert to fraction form
    425.62/587.28 = 239.08/x
  3. Step 3: Cross multiply
    425.62x = 587.28 × 239.08
  4. Step 4: Simplify right side
    425.62x = 140,406.90
  5. Step 5: Solve for x
    x = 140,406.90/425.62
  6. Step 6: Final answer
    x = 329.89

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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.