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Finding the Fourth Proportional to 251.80, 377.70 and 170.46

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Solution

The fourth proportional to 251.80, 377.70 and 170.46 is: 255.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.80 : 377.70 = 170.46 : x
  2. Step 2: Convert to fraction form
    251.80/377.70 = 170.46/x
  3. Step 3: Cross multiply
    251.80x = 377.70 × 170.46
  4. Step 4: Simplify right side
    251.80x = 64,382.74
  5. Step 5: Solve for x
    x = 64,382.74/251.80
  6. Step 6: Final answer
    x = 255.69

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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.