Home / 3,489.30-4,815.50-1,997.68

Finding the Fourth Proportional to 3,489.30, 4,815.50 and 1,997.68

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Solution

The fourth proportional to 3,489.30, 4,815.50 and 1,997.68 is: 2,756.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,489.30 : 4,815.50 = 1,997.68 : x
  2. Step 2: Convert to fraction form
    3,489.30/4,815.50 = 1,997.68/x
  3. Step 3: Cross multiply
    3,489.30x = 4,815.50 × 1,997.68
  4. Step 4: Simplify right side
    3,489.30x = 9,619,828.04
  5. Step 5: Solve for x
    x = 9,619,828.04/3,489.30
  6. Step 6: Final answer
    x = 2,756.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.