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Finding the Fourth Proportional to 251.80, 377.60 and 97.70

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Solution

The fourth proportional to 251.80, 377.60 and 97.70 is: 146.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.80 : 377.60 = 97.70 : x
  2. Step 2: Convert to fraction form
    251.80/377.60 = 97.70/x
  3. Step 3: Cross multiply
    251.80x = 377.60 × 97.70
  4. Step 4: Simplify right side
    251.80x = 36,891.52
  5. Step 5: Solve for x
    x = 36,891.52/251.80
  6. Step 6: Final answer
    x = 146.51

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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.