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Finding the Fourth Proportional to 1,375.11, 2,060.84 and 1,200.15

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Solution

The fourth proportional to 1,375.11, 2,060.84 and 1,200.15 is: 1,798.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375.11 : 2,060.84 = 1,200.15 : x
  2. Step 2: Convert to fraction form
    1,375.11/2,060.84 = 1,200.15/x
  3. Step 3: Cross multiply
    1,375.11x = 2,060.84 × 1,200.15
  4. Step 4: Simplify right side
    1,375.11x = 2,473,320.13
  5. Step 5: Solve for x
    x = 2,473,320.13/1,375.11
  6. Step 6: Final answer
    x = 1,798.63

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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.