Home / 2,989.20-4,480.11-1,039.13

Finding the Fourth Proportional to 2,989.20, 4,480.11 and 1,039.13

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Solution

The fourth proportional to 2,989.20, 4,480.11 and 1,039.13 is: 1,557.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.20 : 4,480.11 = 1,039.13 : x
  2. Step 2: Convert to fraction form
    2,989.20/4,480.11 = 1,039.13/x
  3. Step 3: Cross multiply
    2,989.20x = 4,480.11 × 1,039.13
  4. Step 4: Simplify right side
    2,989.20x = 4,655,394.30
  5. Step 5: Solve for x
    x = 4,655,394.30/2,989.20
  6. Step 6: Final answer
    x = 1,557.40

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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.