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Finding the Fourth Proportional to 727.18, 1,002.83 and 447.20

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Solution

The fourth proportional to 727.18, 1,002.83 and 447.20 is: 616.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.18 : 1,002.83 = 447.20 : x
  2. Step 2: Convert to fraction form
    727.18/1,002.83 = 447.20/x
  3. Step 3: Cross multiply
    727.18x = 1,002.83 × 447.20
  4. Step 4: Simplify right side
    727.18x = 448,461.78
  5. Step 5: Solve for x
    x = 448,461.78/727.18
  6. Step 6: Final answer
    x = 616.72

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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.