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Finding the Fourth Proportional to 425.64, 587.36 and 239.12

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Solution

The fourth proportional to 425.64, 587.36 and 239.12 is: 329.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.64 : 587.36 = 239.12 : x
  2. Step 2: Convert to fraction form
    425.64/587.36 = 239.12/x
  3. Step 3: Cross multiply
    425.64x = 587.36 × 239.12
  4. Step 4: Simplify right side
    425.64x = 140,450.96
  5. Step 5: Solve for x
    x = 140,450.96/425.64
  6. Step 6: Final answer
    x = 329.98

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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.