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Finding the Fourth Proportional to 261.48, 391.84 and 158.52

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Solution

The fourth proportional to 261.48, 391.84 and 158.52 is: 237.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.48 : 391.84 = 158.52 : x
  2. Step 2: Convert to fraction form
    261.48/391.84 = 158.52/x
  3. Step 3: Cross multiply
    261.48x = 391.84 × 158.52
  4. Step 4: Simplify right side
    261.48x = 62,114.48
  5. Step 5: Solve for x
    x = 62,114.48/261.48
  6. Step 6: Final answer
    x = 237.55

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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.