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Finding the Fourth Proportional to 726.11, 1,002.04 and 394.54

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Solution

The fourth proportional to 726.11, 1,002.04 and 394.54 is: 544.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.11 : 1,002.04 = 394.54 : x
  2. Step 2: Convert to fraction form
    726.11/1,002.04 = 394.54/x
  3. Step 3: Cross multiply
    726.11x = 1,002.04 × 394.54
  4. Step 4: Simplify right side
    726.11x = 395,343.99
  5. Step 5: Solve for x
    x = 395,343.99/726.11
  6. Step 6: Final answer
    x = 544.47

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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.