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Finding the Fourth Proportional to 495.27, 742.42 and 278.69

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Solution

The fourth proportional to 495.27, 742.42 and 278.69 is: 417.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.27 : 742.42 = 278.69 : x
  2. Step 2: Convert to fraction form
    495.27/742.42 = 278.69/x
  3. Step 3: Cross multiply
    495.27x = 742.42 × 278.69
  4. Step 4: Simplify right side
    495.27x = 206,905.03
  5. Step 5: Solve for x
    x = 206,905.03/495.27
  6. Step 6: Final answer
    x = 417.76

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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.