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Finding the Fourth Proportional to 249.31, 373.83 and 86.98

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Solution

The fourth proportional to 249.31, 373.83 and 86.98 is: 130.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    249.31 : 373.83 = 86.98 : x
  2. Step 2: Convert to fraction form
    249.31/373.83 = 86.98/x
  3. Step 3: Cross multiply
    249.31x = 373.83 × 86.98
  4. Step 4: Simplify right side
    249.31x = 32,515.73
  5. Step 5: Solve for x
    x = 32,515.73/249.31
  6. Step 6: Final answer
    x = 130.42

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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.