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Finding the Fourth Proportional to 495.12, 742.47 and 186.80

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Solution

The fourth proportional to 495.12, 742.47 and 186.80 is: 280.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.12 : 742.47 = 186.80 : x
  2. Step 2: Convert to fraction form
    495.12/742.47 = 186.80/x
  3. Step 3: Cross multiply
    495.12x = 742.47 × 186.80
  4. Step 4: Simplify right side
    495.12x = 138,689.68
  5. Step 5: Solve for x
    x = 138,689.68/495.12
  6. Step 6: Final answer
    x = 280.11

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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.