Home / 4,288.80-6,422.40-3,187.20

Finding the Fourth Proportional to 4,288.80, 6,422.40 and 3,187.20

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Solution

The fourth proportional to 4,288.80, 6,422.40 and 3,187.20 is: 4,772.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,288.80 : 6,422.40 = 3,187.20 : x
  2. Step 2: Convert to fraction form
    4,288.80/6,422.40 = 3,187.20/x
  3. Step 3: Cross multiply
    4,288.80x = 6,422.40 × 3,187.20
  4. Step 4: Simplify right side
    4,288.80x = 20,469,473.28
  5. Step 5: Solve for x
    x = 20,469,473.28/4,288.80
  6. Step 6: Final answer
    x = 4,772.77

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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.