Home / 2,125.30-3,187.86-1,085.28

Finding the Fourth Proportional to 2,125.30, 3,187.86 and 1,085.28

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Solution

The fourth proportional to 2,125.30, 3,187.86 and 1,085.28 is: 1,627.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.30 : 3,187.86 = 1,085.28 : x
  2. Step 2: Convert to fraction form
    2,125.30/3,187.86 = 1,085.28/x
  3. Step 3: Cross multiply
    2,125.30x = 3,187.86 × 1,085.28
  4. Step 4: Simplify right side
    2,125.30x = 3,459,720.70
  5. Step 5: Solve for x
    x = 3,459,720.70/2,125.30
  6. Step 6: Final answer
    x = 1,627.87

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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.