Home / 2,785.11-3,842.78-1,543.11

Finding the Fourth Proportional to 2,785.11, 3,842.78 and 1,543.11

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Solution

The fourth proportional to 2,785.11, 3,842.78 and 1,543.11 is: 2,129.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.11 : 3,842.78 = 1,543.11 : x
  2. Step 2: Convert to fraction form
    2,785.11/3,842.78 = 1,543.11/x
  3. Step 3: Cross multiply
    2,785.11x = 3,842.78 × 1,543.11
  4. Step 4: Simplify right side
    2,785.11x = 5,929,824.53
  5. Step 5: Solve for x
    x = 5,929,824.53/2,785.11
  6. Step 6: Final answer
    x = 2,129.12

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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.