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Finding the Fourth Proportional to 726.39, 1,002.42 and 394.83

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Solution

The fourth proportional to 726.39, 1,002.42 and 394.83 is: 544.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.39 : 1,002.42 = 394.83 : x
  2. Step 2: Convert to fraction form
    726.39/1,002.42 = 394.83/x
  3. Step 3: Cross multiply
    726.39x = 1,002.42 × 394.83
  4. Step 4: Simplify right side
    726.39x = 395,783.99
  5. Step 5: Solve for x
    x = 395,783.99/726.39
  6. Step 6: Final answer
    x = 544.86

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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.