Home / 2,095.64-3,142.23-861.57

Finding the Fourth Proportional to 2,095.64, 3,142.23 and 861.57

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Solution

The fourth proportional to 2,095.64, 3,142.23 and 861.57 is: 1,291.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,095.64 : 3,142.23 = 861.57 : x
  2. Step 2: Convert to fraction form
    2,095.64/3,142.23 = 861.57/x
  3. Step 3: Cross multiply
    2,095.64x = 3,142.23 × 861.57
  4. Step 4: Simplify right side
    2,095.64x = 2,707,247.87
  5. Step 5: Solve for x
    x = 2,707,247.87/2,095.64
  6. Step 6: Final answer
    x = 1,291.85

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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.