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Finding the Fourth Proportional to 425.57, 587.28 and 239.07

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Solution

The fourth proportional to 425.57, 587.28 and 239.07 is: 329.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.57 : 587.28 = 239.07 : x
  2. Step 2: Convert to fraction form
    425.57/587.28 = 239.07/x
  3. Step 3: Cross multiply
    425.57x = 587.28 × 239.07
  4. Step 4: Simplify right side
    425.57x = 140,401.03
  5. Step 5: Solve for x
    x = 140,401.03/425.57
  6. Step 6: Final answer
    x = 329.91

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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.