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Finding the Fourth Proportional to 2,274.75, 3,412.17 and 813.87

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Solution

The fourth proportional to 2,274.75, 3,412.17 and 813.87 is: 1,220.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,274.75 : 3,412.17 = 813.87 : x
  2. Step 2: Convert to fraction form
    2,274.75/3,412.17 = 813.87/x
  3. Step 3: Cross multiply
    2,274.75x = 3,412.17 × 813.87
  4. Step 4: Simplify right side
    2,274.75x = 2,777,062.80
  5. Step 5: Solve for x
    x = 2,777,062.80/2,274.75
  6. Step 6: Final answer
    x = 1,220.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.