Home / 4,321.28-6,479.80-1,980.56

Finding the Fourth Proportional to 4,321.28, 6,479.80 and 1,980.56

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Solution

The fourth proportional to 4,321.28, 6,479.80 and 1,980.56 is: 2,969.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,321.28 : 6,479.80 = 1,980.56 : x
  2. Step 2: Convert to fraction form
    4,321.28/6,479.80 = 1,980.56/x
  3. Step 3: Cross multiply
    4,321.28x = 6,479.80 × 1,980.56
  4. Step 4: Simplify right side
    4,321.28x = 12,833,632.69
  5. Step 5: Solve for x
    x = 12,833,632.69/4,321.28
  6. Step 6: Final answer
    x = 2,969.87

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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.