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Finding the Fourth Proportional to 839.97, 1,156.48 and 729.41

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Solution

The fourth proportional to 839.97, 1,156.48 and 729.41 is: 1,004.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.97 : 1,156.48 = 729.41 : x
  2. Step 2: Convert to fraction form
    839.97/1,156.48 = 729.41/x
  3. Step 3: Cross multiply
    839.97x = 1,156.48 × 729.41
  4. Step 4: Simplify right side
    839.97x = 843,540.47
  5. Step 5: Solve for x
    x = 843,540.47/839.97
  6. Step 6: Final answer
    x = 1,004.25

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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.