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Finding the Fourth Proportional to 425.49, 587.24 and 239.05

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Solution

The fourth proportional to 425.49, 587.24 and 239.05 is: 329.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.49 : 587.24 = 239.05 : x
  2. Step 2: Convert to fraction form
    425.49/587.24 = 239.05/x
  3. Step 3: Cross multiply
    425.49x = 587.24 × 239.05
  4. Step 4: Simplify right side
    425.49x = 140,379.72
  5. Step 5: Solve for x
    x = 140,379.72/425.49
  6. Step 6: Final answer
    x = 329.92

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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.