Home / 2,380.85-3,286.13-1,386.29

Finding the Fourth Proportional to 2,380.85, 3,286.13 and 1,386.29

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Solution

The fourth proportional to 2,380.85, 3,286.13 and 1,386.29 is: 1,913.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,380.85 : 3,286.13 = 1,386.29 : x
  2. Step 2: Convert to fraction form
    2,380.85/3,286.13 = 1,386.29/x
  3. Step 3: Cross multiply
    2,380.85x = 3,286.13 × 1,386.29
  4. Step 4: Simplify right side
    2,380.85x = 4,555,505.80
  5. Step 5: Solve for x
    x = 4,555,505.80/2,380.85
  6. Step 6: Final answer
    x = 1,913.40

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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.