Home / 3,128.96-4,691.20-1,180.16

Finding the Fourth Proportional to 3,128.96, 4,691.20 and 1,180.16

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Solution

The fourth proportional to 3,128.96, 4,691.20 and 1,180.16 is: 1,769.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.96 : 4,691.20 = 1,180.16 : x
  2. Step 2: Convert to fraction form
    3,128.96/4,691.20 = 1,180.16/x
  3. Step 3: Cross multiply
    3,128.96x = 4,691.20 × 1,180.16
  4. Step 4: Simplify right side
    3,128.96x = 5,536,366.59
  5. Step 5: Solve for x
    x = 5,536,366.59/3,128.96
  6. Step 6: Final answer
    x = 1,769.40

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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.