Home / 2,091.42-2,885.68-1,251.80

Finding the Fourth Proportional to 2,091.42, 2,885.68 and 1,251.80

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Solution

The fourth proportional to 2,091.42, 2,885.68 and 1,251.80 is: 1,727.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.42 : 2,885.68 = 1,251.80 : x
  2. Step 2: Convert to fraction form
    2,091.42/2,885.68 = 1,251.80/x
  3. Step 3: Cross multiply
    2,091.42x = 2,885.68 × 1,251.80
  4. Step 4: Simplify right side
    2,091.42x = 3,612,301.37
  5. Step 5: Solve for x
    x = 3,612,301.37/2,091.42
  6. Step 6: Final answer
    x = 1,727.20

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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.