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Finding the Fourth Proportional to 425.71, 587.02 and 392.23

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Solution

The fourth proportional to 425.71, 587.02 and 392.23 is: 540.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.71 : 587.02 = 392.23 : x
  2. Step 2: Convert to fraction form
    425.71/587.02 = 392.23/x
  3. Step 3: Cross multiply
    425.71x = 587.02 × 392.23
  4. Step 4: Simplify right side
    425.71x = 230,241.96
  5. Step 5: Solve for x
    x = 230,241.96/425.71
  6. Step 6: Final answer
    x = 540.85

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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.