Home / 2,174.15-3,261.50-712.80

Finding the Fourth Proportional to 2,174.15, 3,261.50 and 712.80

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Solution

The fourth proportional to 2,174.15, 3,261.50 and 712.80 is: 1,069.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.15 : 3,261.50 = 712.80 : x
  2. Step 2: Convert to fraction form
    2,174.15/3,261.50 = 712.80/x
  3. Step 3: Cross multiply
    2,174.15x = 3,261.50 × 712.80
  4. Step 4: Simplify right side
    2,174.15x = 2,324,793.64
  5. Step 5: Solve for x
    x = 2,324,793.64/2,174.15
  6. Step 6: Final answer
    x = 1,069.29

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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.