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Finding the Fourth Proportional to 343.88, 515.48 and 281.56

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Solution

The fourth proportional to 343.88, 515.48 and 281.56 is: 422.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.88 : 515.48 = 281.56 : x
  2. Step 2: Convert to fraction form
    343.88/515.48 = 281.56/x
  3. Step 3: Cross multiply
    343.88x = 515.48 × 281.56
  4. Step 4: Simplify right side
    343.88x = 145,138.55
  5. Step 5: Solve for x
    x = 145,138.55/343.88
  6. Step 6: Final answer
    x = 422.06

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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.