Home / 3,191.40-4,785.89-1,243.15

Finding the Fourth Proportional to 3,191.40, 4,785.89 and 1,243.15

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Solution

The fourth proportional to 3,191.40, 4,785.89 and 1,243.15 is: 1,864.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,191.40 : 4,785.89 = 1,243.15 : x
  2. Step 2: Convert to fraction form
    3,191.40/4,785.89 = 1,243.15/x
  3. Step 3: Cross multiply
    3,191.40x = 4,785.89 × 1,243.15
  4. Step 4: Simplify right side
    3,191.40x = 5,949,560.97
  5. Step 5: Solve for x
    x = 5,949,560.97/3,191.40
  6. Step 6: Final answer
    x = 1,864.25

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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.