Home / 3,280.25-4,920.38-1,089.15

Finding the Fourth Proportional to 3,280.25, 4,920.38 and 1,089.15

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Solution

The fourth proportional to 3,280.25, 4,920.38 and 1,089.15 is: 1,633.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.25 : 4,920.38 = 1,089.15 : x
  2. Step 2: Convert to fraction form
    3,280.25/4,920.38 = 1,089.15/x
  3. Step 3: Cross multiply
    3,280.25x = 4,920.38 × 1,089.15
  4. Step 4: Simplify right side
    3,280.25x = 5,359,012.06
  5. Step 5: Solve for x
    x = 5,359,012.06/3,280.25
  6. Step 6: Final answer
    x = 1,633.72

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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.