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Finding the Fourth Proportional to 251.98, 377.98 and 89.69

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Solution

The fourth proportional to 251.98, 377.98 and 89.69 is: 134.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.98 : 377.98 = 89.69 : x
  2. Step 2: Convert to fraction form
    251.98/377.98 = 89.69/x
  3. Step 3: Cross multiply
    251.98x = 377.98 × 89.69
  4. Step 4: Simplify right side
    251.98x = 33,898.91
  5. Step 5: Solve for x
    x = 33,898.91/251.98
  6. Step 6: Final answer
    x = 134.53

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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.