Home / 3,412.89-5,120.25-1,659.66

Finding the Fourth Proportional to 3,412.89, 5,120.25 and 1,659.66

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Solution

The fourth proportional to 3,412.89, 5,120.25 and 1,659.66 is: 2,489.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,412.89 : 5,120.25 = 1,659.66 : x
  2. Step 2: Convert to fraction form
    3,412.89/5,120.25 = 1,659.66/x
  3. Step 3: Cross multiply
    3,412.89x = 5,120.25 × 1,659.66
  4. Step 4: Simplify right side
    3,412.89x = 8,497,874.12
  5. Step 5: Solve for x
    x = 8,497,874.12/3,412.89
  6. Step 6: Final answer
    x = 2,489.93

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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.