Home / 1,861.13-2,568.27-1,115.12

Finding the Fourth Proportional to 1,861.13, 2,568.27 and 1,115.12

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Solution

The fourth proportional to 1,861.13, 2,568.27 and 1,115.12 is: 1,538.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.13 : 2,568.27 = 1,115.12 : x
  2. Step 2: Convert to fraction form
    1,861.13/2,568.27 = 1,115.12/x
  3. Step 3: Cross multiply
    1,861.13x = 2,568.27 × 1,115.12
  4. Step 4: Simplify right side
    1,861.13x = 2,863,929.24
  5. Step 5: Solve for x
    x = 2,863,929.24/1,861.13
  6. Step 6: Final answer
    x = 1,538.81

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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.