Home / 3,990.60-5,977.80-2,043.90

Finding the Fourth Proportional to 3,990.60, 5,977.80 and 2,043.90

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Solution

The fourth proportional to 3,990.60, 5,977.80 and 2,043.90 is: 3,061.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.60 : 5,977.80 = 2,043.90 : x
  2. Step 2: Convert to fraction form
    3,990.60/5,977.80 = 2,043.90/x
  3. Step 3: Cross multiply
    3,990.60x = 5,977.80 × 2,043.90
  4. Step 4: Simplify right side
    3,990.60x = 12,218,025.42
  5. Step 5: Solve for x
    x = 12,218,025.42/3,990.60
  6. Step 6: Final answer
    x = 3,061.70

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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.