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Finding the Fourth Proportional to 495.12, 742.55 and 186.87

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Solution

The fourth proportional to 495.12, 742.55 and 186.87 is: 280.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.12 : 742.55 = 186.87 : x
  2. Step 2: Convert to fraction form
    495.12/742.55 = 186.87/x
  3. Step 3: Cross multiply
    495.12x = 742.55 × 186.87
  4. Step 4: Simplify right side
    495.12x = 138,759.38
  5. Step 5: Solve for x
    x = 138,759.38/495.12
  6. Step 6: Final answer
    x = 280.25

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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.