Home / 3,387.92-5,090.40-2,155.88

Finding the Fourth Proportional to 3,387.92, 5,090.40 and 2,155.88

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Solution

The fourth proportional to 3,387.92, 5,090.40 and 2,155.88 is: 3,239.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,387.92 : 5,090.40 = 2,155.88 : x
  2. Step 2: Convert to fraction form
    3,387.92/5,090.40 = 2,155.88/x
  3. Step 3: Cross multiply
    3,387.92x = 5,090.40 × 2,155.88
  4. Step 4: Simplify right side
    3,387.92x = 10,974,291.55
  5. Step 5: Solve for x
    x = 10,974,291.55/3,387.92
  6. Step 6: Final answer
    x = 3,239.24

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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.