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Finding the Fourth Proportional to 342.01, 512.88 and 187.90

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Solution

The fourth proportional to 342.01, 512.88 and 187.90 is: 281.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.01 : 512.88 = 187.90 : x
  2. Step 2: Convert to fraction form
    342.01/512.88 = 187.90/x
  3. Step 3: Cross multiply
    342.01x = 512.88 × 187.90
  4. Step 4: Simplify right side
    342.01x = 96,370.15
  5. Step 5: Solve for x
    x = 96,370.15/342.01
  6. Step 6: Final answer
    x = 281.78

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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.