Home / 2,166.96-3,255.80-1,387.31

Finding the Fourth Proportional to 2,166.96, 3,255.80 and 1,387.31

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Solution

The fourth proportional to 2,166.96, 3,255.80 and 1,387.31 is: 2,084.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,166.96 : 3,255.80 = 1,387.31 : x
  2. Step 2: Convert to fraction form
    2,166.96/3,255.80 = 1,387.31/x
  3. Step 3: Cross multiply
    2,166.96x = 3,255.80 × 1,387.31
  4. Step 4: Simplify right side
    2,166.96x = 4,516,780.68
  5. Step 5: Solve for x
    x = 4,516,780.68/2,166.96
  6. Step 6: Final answer
    x = 2,084.38

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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.