Home / 2,121.31-3,178.19-886.00

Finding the Fourth Proportional to 2,121.31, 3,178.19 and 886.00

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Solution

The fourth proportional to 2,121.31, 3,178.19 and 886.00 is: 1,327.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.31 : 3,178.19 = 886.00 : x
  2. Step 2: Convert to fraction form
    2,121.31/3,178.19 = 886.00/x
  3. Step 3: Cross multiply
    2,121.31x = 3,178.19 × 886.00
  4. Step 4: Simplify right side
    2,121.31x = 2,815,866.64
  5. Step 5: Solve for x
    x = 2,815,866.64/2,121.31
  6. Step 6: Final answer
    x = 1,327.42

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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.