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Finding the Fourth Proportional to 343.98, 515.98 and 112.90

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Solution

The fourth proportional to 343.98, 515.98 and 112.90 is: 169.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    343.98 : 515.98 = 112.90 : x
  2. Step 2: Convert to fraction form
    343.98/515.98 = 112.90/x
  3. Step 3: Cross multiply
    343.98x = 515.98 × 112.90
  4. Step 4: Simplify right side
    343.98x = 58,254.14
  5. Step 5: Solve for x
    x = 58,254.14/343.98
  6. Step 6: Final answer
    x = 169.35

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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.