Home / 3,108.31-4,289.34-1,781.09

Finding the Fourth Proportional to 3,108.31, 4,289.34 and 1,781.09

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Solution

The fourth proportional to 3,108.31, 4,289.34 and 1,781.09 is: 2,457.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.31 : 4,289.34 = 1,781.09 : x
  2. Step 2: Convert to fraction form
    3,108.31/4,289.34 = 1,781.09/x
  3. Step 3: Cross multiply
    3,108.31x = 4,289.34 × 1,781.09
  4. Step 4: Simplify right side
    3,108.31x = 7,639,691.88
  5. Step 5: Solve for x
    x = 7,639,691.88/3,108.31
  6. Step 6: Final answer
    x = 2,457.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.