Home / 2,654.40-3,985.20-2,107.20

Finding the Fourth Proportional to 2,654.40, 3,985.20 and 2,107.20

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Solution

The fourth proportional to 2,654.40, 3,985.20 and 2,107.20 is: 3,163.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,654.40 : 3,985.20 = 2,107.20 : x
  2. Step 2: Convert to fraction form
    2,654.40/3,985.20 = 2,107.20/x
  3. Step 3: Cross multiply
    2,654.40x = 3,985.20 × 2,107.20
  4. Step 4: Simplify right side
    2,654.40x = 8,397,613.44
  5. Step 5: Solve for x
    x = 8,397,613.44/2,654.40
  6. Step 6: Final answer
    x = 3,163.66

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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.