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Finding the Fourth Proportional to 727.29, 1,003.14 and 447.30

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Solution

The fourth proportional to 727.29, 1,003.14 and 447.30 is: 616.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.29 : 1,003.14 = 447.30 : x
  2. Step 2: Convert to fraction form
    727.29/1,003.14 = 447.30/x
  3. Step 3: Cross multiply
    727.29x = 1,003.14 × 447.30
  4. Step 4: Simplify right side
    727.29x = 448,704.52
  5. Step 5: Solve for x
    x = 448,704.52/727.29
  6. Step 6: Final answer
    x = 616.95

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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.