Home / 2,209.15-3,315.65-1,169.90

Finding the Fourth Proportional to 2,209.15, 3,315.65 and 1,169.90

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Solution

The fourth proportional to 2,209.15, 3,315.65 and 1,169.90 is: 1,755.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,209.15 : 3,315.65 = 1,169.90 : x
  2. Step 2: Convert to fraction form
    2,209.15/3,315.65 = 1,169.90/x
  3. Step 3: Cross multiply
    2,209.15x = 3,315.65 × 1,169.90
  4. Step 4: Simplify right side
    2,209.15x = 3,878,978.94
  5. Step 5: Solve for x
    x = 3,878,978.94/2,209.15
  6. Step 6: Final answer
    x = 1,755.87

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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.