Home / 2,861.80-3,948.96-1,742.79

Finding the Fourth Proportional to 2,861.80, 3,948.96 and 1,742.79

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Solution

The fourth proportional to 2,861.80, 3,948.96 and 1,742.79 is: 2,404.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,861.80 : 3,948.96 = 1,742.79 : x
  2. Step 2: Convert to fraction form
    2,861.80/3,948.96 = 1,742.79/x
  3. Step 3: Cross multiply
    2,861.80x = 3,948.96 × 1,742.79
  4. Step 4: Simplify right side
    2,861.80x = 6,882,208.00
  5. Step 5: Solve for x
    x = 6,882,208.00/2,861.80
  6. Step 6: Final answer
    x = 2,404.85

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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.