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Finding the Fourth Proportional to 425.63, 587.31 and 239.12

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Solution

The fourth proportional to 425.63, 587.31 and 239.12 is: 329.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.63 : 587.31 = 239.12 : x
  2. Step 2: Convert to fraction form
    425.63/587.31 = 239.12/x
  3. Step 3: Cross multiply
    425.63x = 587.31 × 239.12
  4. Step 4: Simplify right side
    425.63x = 140,435.94
  5. Step 5: Solve for x
    x = 140,435.94/425.63
  6. Step 6: Final answer
    x = 329.95

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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.