Home / 3,120.34-4,680.52-811.84

Finding the Fourth Proportional to 3,120.34, 4,680.52 and 811.84

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Solution

The fourth proportional to 3,120.34, 4,680.52 and 811.84 is: 1,217.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.34 : 4,680.52 = 811.84 : x
  2. Step 2: Convert to fraction form
    3,120.34/4,680.52 = 811.84/x
  3. Step 3: Cross multiply
    3,120.34x = 4,680.52 × 811.84
  4. Step 4: Simplify right side
    3,120.34x = 3,799,833.36
  5. Step 5: Solve for x
    x = 3,799,833.36/3,120.34
  6. Step 6: Final answer
    x = 1,217.76

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Similar ratio
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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.