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Finding the Fourth Proportional to 454.15, 680.47 and 248.89

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Solution

The fourth proportional to 454.15, 680.47 and 248.89 is: 372.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.15 : 680.47 = 248.89 : x
  2. Step 2: Convert to fraction form
    454.15/680.47 = 248.89/x
  3. Step 3: Cross multiply
    454.15x = 680.47 × 248.89
  4. Step 4: Simplify right side
    454.15x = 169,359.85
  5. Step 5: Solve for x
    x = 169,359.85/454.15
  6. Step 6: Final answer
    x = 372.92

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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.