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Finding the Fourth Proportional to 1,040.66, 1,435.38 and 726.04

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Solution

The fourth proportional to 1,040.66, 1,435.38 and 726.04 is: 1,001.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.66 : 1,435.38 = 726.04 : x
  2. Step 2: Convert to fraction form
    1,040.66/1,435.38 = 726.04/x
  3. Step 3: Cross multiply
    1,040.66x = 1,435.38 × 726.04
  4. Step 4: Simplify right side
    1,040.66x = 1,042,143.30
  5. Step 5: Solve for x
    x = 1,042,143.30/1,040.66
  6. Step 6: Final answer
    x = 1,001.43

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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.