Home / 2,861.12-4,292.40-809.12

Finding the Fourth Proportional to 2,861.12, 4,292.40 and 809.12

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Solution

The fourth proportional to 2,861.12, 4,292.40 and 809.12 is: 1,213.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,861.12 : 4,292.40 = 809.12 : x
  2. Step 2: Convert to fraction form
    2,861.12/4,292.40 = 809.12/x
  3. Step 3: Cross multiply
    2,861.12x = 4,292.40 × 809.12
  4. Step 4: Simplify right side
    2,861.12x = 3,473,066.69
  5. Step 5: Solve for x
    x = 3,473,066.69/2,861.12
  6. Step 6: Final answer
    x = 1,213.88

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1.5x scale

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.