Home / 3,990.30-5,989.77-2,949.18

Finding the Fourth Proportional to 3,990.30, 5,989.77 and 2,949.18

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Solution

The fourth proportional to 3,990.30, 5,989.77 and 2,949.18 is: 4,426.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.30 : 5,989.77 = 2,949.18 : x
  2. Step 2: Convert to fraction form
    3,990.30/5,989.77 = 2,949.18/x
  3. Step 3: Cross multiply
    3,990.30x = 5,989.77 × 2,949.18
  4. Step 4: Simplify right side
    3,990.30x = 17,664,909.89
  5. Step 5: Solve for x
    x = 17,664,909.89/3,990.30
  6. Step 6: Final answer
    x = 4,426.96

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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.