Home / 2,312.80-3,191.46-1,318.04

Finding the Fourth Proportional to 2,312.80, 3,191.46 and 1,318.04

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Solution

The fourth proportional to 2,312.80, 3,191.46 and 1,318.04 is: 1,818.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.80 : 3,191.46 = 1,318.04 : x
  2. Step 2: Convert to fraction form
    2,312.80/3,191.46 = 1,318.04/x
  3. Step 3: Cross multiply
    2,312.80x = 3,191.46 × 1,318.04
  4. Step 4: Simplify right side
    2,312.80x = 4,206,471.94
  5. Step 5: Solve for x
    x = 4,206,471.94/2,312.80
  6. Step 6: Final answer
    x = 1,818.78

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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.