Home / 6,439.76-9,660.40-2,278.90

Finding the Fourth Proportional to 6,439.76, 9,660.40 and 2,278.90

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Solution

The fourth proportional to 6,439.76, 9,660.40 and 2,278.90 is: 3,418.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,439.76 : 9,660.40 = 2,278.90 : x
  2. Step 2: Convert to fraction form
    6,439.76/9,660.40 = 2,278.90/x
  3. Step 3: Cross multiply
    6,439.76x = 9,660.40 × 2,278.90
  4. Step 4: Simplify right side
    6,439.76x = 22,015,085.56
  5. Step 5: Solve for x
    x = 22,015,085.56/6,439.76
  6. Step 6: Final answer
    x = 3,418.62

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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.