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Finding the Fourth Proportional to 348.97, 523.70 and 281.31

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Solution

The fourth proportional to 348.97, 523.70 and 281.31 is: 422.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.97 : 523.70 = 281.31 : x
  2. Step 2: Convert to fraction form
    348.97/523.70 = 281.31/x
  3. Step 3: Cross multiply
    348.97x = 523.70 × 281.31
  4. Step 4: Simplify right side
    348.97x = 147,319.43
  5. Step 5: Solve for x
    x = 147,319.43/348.97
  6. Step 6: Final answer
    x = 422.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.