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Finding the Fourth Proportional to 1,375.96, 2,061.19 and 827.85

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Solution

The fourth proportional to 1,375.96, 2,061.19 and 827.85 is: 1,240.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375.96 : 2,061.19 = 827.85 : x
  2. Step 2: Convert to fraction form
    1,375.96/2,061.19 = 827.85/x
  3. Step 3: Cross multiply
    1,375.96x = 2,061.19 × 827.85
  4. Step 4: Simplify right side
    1,375.96x = 1,706,356.14
  5. Step 5: Solve for x
    x = 1,706,356.14/1,375.96
  6. Step 6: Final answer
    x = 1,240.12

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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.