Home / 2,085.12-3,126.38-1,029.60

Finding the Fourth Proportional to 2,085.12, 3,126.38 and 1,029.60

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Solution

The fourth proportional to 2,085.12, 3,126.38 and 1,029.60 is: 1,543.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,085.12 : 3,126.38 = 1,029.60 : x
  2. Step 2: Convert to fraction form
    2,085.12/3,126.38 = 1,029.60/x
  3. Step 3: Cross multiply
    2,085.12x = 3,126.38 × 1,029.60
  4. Step 4: Simplify right side
    2,085.12x = 3,218,920.85
  5. Step 5: Solve for x
    x = 3,218,920.85/2,085.12
  6. Step 6: Final answer
    x = 1,543.76

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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.