Home / 3,108.68-4,288.55-2,166.78

Finding the Fourth Proportional to 3,108.68, 4,288.55 and 2,166.78

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Solution

The fourth proportional to 3,108.68, 4,288.55 and 2,166.78 is: 2,989.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.68 : 4,288.55 = 2,166.78 : x
  2. Step 2: Convert to fraction form
    3,108.68/4,288.55 = 2,166.78/x
  3. Step 3: Cross multiply
    3,108.68x = 4,288.55 × 2,166.78
  4. Step 4: Simplify right side
    3,108.68x = 9,292,333.54
  5. Step 5: Solve for x
    x = 9,292,333.54/3,108.68
  6. Step 6: Final answer
    x = 2,989.16

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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.