Home / 2,178.13-3,267.15-879.25

Finding the Fourth Proportional to 2,178.13, 3,267.15 and 879.25

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Solution

The fourth proportional to 2,178.13, 3,267.15 and 879.25 is: 1,318.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.13 : 3,267.15 = 879.25 : x
  2. Step 2: Convert to fraction form
    2,178.13/3,267.15 = 879.25/x
  3. Step 3: Cross multiply
    2,178.13x = 3,267.15 × 879.25
  4. Step 4: Simplify right side
    2,178.13x = 2,872,641.64
  5. Step 5: Solve for x
    x = 2,872,641.64/2,178.13
  6. Step 6: Final answer
    x = 1,318.86

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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.