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Finding the Fourth Proportional to 813.04, 1,122.92 and 725.56

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Solution

The fourth proportional to 813.04, 1,122.92 and 725.56 is: 1,002.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    813.04 : 1,122.92 = 725.56 : x
  2. Step 2: Convert to fraction form
    813.04/1,122.92 = 725.56/x
  3. Step 3: Cross multiply
    813.04x = 1,122.92 × 725.56
  4. Step 4: Simplify right side
    813.04x = 814,745.84
  5. Step 5: Solve for x
    x = 814,745.84/813.04
  6. Step 6: Final answer
    x = 1,002.10

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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.