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Finding the Fourth Proportional to 343.73, 515.41 and 112.57

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Solution

The fourth proportional to 343.73, 515.41 and 112.57 is: 168.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.73 : 515.41 = 112.57 : x
  2. Step 2: Convert to fraction form
    343.73/515.41 = 112.57/x
  3. Step 3: Cross multiply
    343.73x = 515.41 × 112.57
  4. Step 4: Simplify right side
    343.73x = 58,018.13
  5. Step 5: Solve for x
    x = 58,018.13/343.73
  6. Step 6: Final answer
    x = 168.79

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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.