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Finding the Fourth Proportional to 252.42, 377.90 and 191.79

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Solution

The fourth proportional to 252.42, 377.90 and 191.79 is: 287.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    252.42 : 377.90 = 191.79 : x
  2. Step 2: Convert to fraction form
    252.42/377.90 = 191.79/x
  3. Step 3: Cross multiply
    252.42x = 377.90 × 191.79
  4. Step 4: Simplify right side
    252.42x = 72,476.48
  5. Step 5: Solve for x
    x = 72,476.48/252.42
  6. Step 6: Final answer
    x = 287.13

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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.