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Finding the Fourth Proportional to 344.18, 516.28 and 87.68

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Solution

The fourth proportional to 344.18, 516.28 and 87.68 is: 131.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.18 : 516.28 = 87.68 : x
  2. Step 2: Convert to fraction form
    344.18/516.28 = 87.68/x
  3. Step 3: Cross multiply
    344.18x = 516.28 × 87.68
  4. Step 4: Simplify right side
    344.18x = 45,267.43
  5. Step 5: Solve for x
    x = 45,267.43/344.18
  6. Step 6: Final answer
    x = 131.52

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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.