Home / 3,149.28-4,723.80-809.30

Finding the Fourth Proportional to 3,149.28, 4,723.80 and 809.30

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Solution

The fourth proportional to 3,149.28, 4,723.80 and 809.30 is: 1,213.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,149.28 : 4,723.80 = 809.30 : x
  2. Step 2: Convert to fraction form
    3,149.28/4,723.80 = 809.30/x
  3. Step 3: Cross multiply
    3,149.28x = 4,723.80 × 809.30
  4. Step 4: Simplify right side
    3,149.28x = 3,822,971.34
  5. Step 5: Solve for x
    x = 3,822,971.34/3,149.28
  6. Step 6: Final answer
    x = 1,213.92

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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.