Home / 2,114.19-3,171.83-815.76

Finding the Fourth Proportional to 2,114.19, 3,171.83 and 815.76

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Solution

The fourth proportional to 2,114.19, 3,171.83 and 815.76 is: 1,223.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,114.19 : 3,171.83 = 815.76 : x
  2. Step 2: Convert to fraction form
    2,114.19/3,171.83 = 815.76/x
  3. Step 3: Cross multiply
    2,114.19x = 3,171.83 × 815.76
  4. Step 4: Simplify right side
    2,114.19x = 2,587,447.96
  5. Step 5: Solve for x
    x = 2,587,447.96/2,114.19
  6. Step 6: Final answer
    x = 1,223.85

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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.