Home / 2,879.20-4,318.68-931.36

Finding the Fourth Proportional to 2,879.20, 4,318.68 and 931.36

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Solution

The fourth proportional to 2,879.20, 4,318.68 and 931.36 is: 1,397.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,879.20 : 4,318.68 = 931.36 : x
  2. Step 2: Convert to fraction form
    2,879.20/4,318.68 = 931.36/x
  3. Step 3: Cross multiply
    2,879.20x = 4,318.68 × 931.36
  4. Step 4: Simplify right side
    2,879.20x = 4,022,245.80
  5. Step 5: Solve for x
    x = 4,022,245.80/2,879.20
  6. Step 6: Final answer
    x = 1,397.00

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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.