Home / 3,308.11-4,564.85-1,981.78

Finding the Fourth Proportional to 3,308.11, 4,564.85 and 1,981.78

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Solution

The fourth proportional to 3,308.11, 4,564.85 and 1,981.78 is: 2,734.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,308.11 : 4,564.85 = 1,981.78 : x
  2. Step 2: Convert to fraction form
    3,308.11/4,564.85 = 1,981.78/x
  3. Step 3: Cross multiply
    3,308.11x = 4,564.85 × 1,981.78
  4. Step 4: Simplify right side
    3,308.11x = 9,046,514.54
  5. Step 5: Solve for x
    x = 9,046,514.54/3,308.11
  6. Step 6: Final answer
    x = 2,734.65

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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.