Home / 2,125.31-3,185.03-1,188.75

Finding the Fourth Proportional to 2,125.31, 3,185.03 and 1,188.75

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Solution

The fourth proportional to 2,125.31, 3,185.03 and 1,188.75 is: 1,781.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.31 : 3,185.03 = 1,188.75 : x
  2. Step 2: Convert to fraction form
    2,125.31/3,185.03 = 1,188.75/x
  3. Step 3: Cross multiply
    2,125.31x = 3,185.03 × 1,188.75
  4. Step 4: Simplify right side
    2,125.31x = 3,786,207.38
  5. Step 5: Solve for x
    x = 3,786,207.38/2,125.31
  6. Step 6: Final answer
    x = 1,781.48

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1.5x scale

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.