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Finding the Fourth Proportional to 494.72, 681.12 and 447.68

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Solution

The fourth proportional to 494.72, 681.12 and 447.68 is: 616.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.72 : 681.12 = 447.68 : x
  2. Step 2: Convert to fraction form
    494.72/681.12 = 447.68/x
  3. Step 3: Cross multiply
    494.72x = 681.12 × 447.68
  4. Step 4: Simplify right side
    494.72x = 304,923.80
  5. Step 5: Solve for x
    x = 304,923.80/494.72
  6. Step 6: Final answer
    x = 616.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.