Home / 2,785.12-3,843.36-1,543.20

Finding the Fourth Proportional to 2,785.12, 3,843.36 and 1,543.20

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Solution

The fourth proportional to 2,785.12, 3,843.36 and 1,543.20 is: 2,129.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.12 : 3,843.36 = 1,543.20 : x
  2. Step 2: Convert to fraction form
    2,785.12/3,843.36 = 1,543.20/x
  3. Step 3: Cross multiply
    2,785.12x = 3,843.36 × 1,543.20
  4. Step 4: Simplify right side
    2,785.12x = 5,931,073.15
  5. Step 5: Solve for x
    x = 5,931,073.15/2,785.12
  6. Step 6: Final answer
    x = 2,129.56

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1.5x scale

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.