Home / 2,125.12-3,188.92-892.43

Finding the Fourth Proportional to 2,125.12, 3,188.92 and 892.43

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Solution

The fourth proportional to 2,125.12, 3,188.92 and 892.43 is: 1,339.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.12 : 3,188.92 = 892.43 : x
  2. Step 2: Convert to fraction form
    2,125.12/3,188.92 = 892.43/x
  3. Step 3: Cross multiply
    2,125.12x = 3,188.92 × 892.43
  4. Step 4: Simplify right side
    2,125.12x = 2,845,871.93
  5. Step 5: Solve for x
    x = 2,845,871.93/2,125.12
  6. Step 6: Final answer
    x = 1,339.16

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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.