Home / 2,989.28-4,478-2,049.92

Finding the Fourth Proportional to 2,989.28, 4,478 and 2,049.92

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Solution

The fourth proportional to 2,989.28, 4,478 and 2,049.92 is: 3,070.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.28 : 4,478 = 2,049.92 : x
  2. Step 2: Convert to fraction form
    2,989.28/4,478 = 2,049.92/x
  3. Step 3: Cross multiply
    2,989.28x = 4,478 × 2,049.92
  4. Step 4: Simplify right side
    2,989.28x = 9,179,541.76
  5. Step 5: Solve for x
    x = 9,179,541.76/2,989.28
  6. Step 6: Final answer
    x = 3,070.82

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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.