Home / 3,781.95-5,218.56-2,289.57

Finding the Fourth Proportional to 3,781.95, 5,218.56 and 2,289.57

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Solution

The fourth proportional to 3,781.95, 5,218.56 and 2,289.57 is: 3,159.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.95 : 5,218.56 = 2,289.57 : x
  2. Step 2: Convert to fraction form
    3,781.95/5,218.56 = 2,289.57/x
  3. Step 3: Cross multiply
    3,781.95x = 5,218.56 × 2,289.57
  4. Step 4: Simplify right side
    3,781.95x = 11,948,258.42
  5. Step 5: Solve for x
    x = 11,948,258.42/3,781.95
  6. Step 6: Final answer
    x = 3,159.29

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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.