Home / 2,381.20-3,286.25-1,386.56

Finding the Fourth Proportional to 2,381.20, 3,286.25 and 1,386.56

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Solution

The fourth proportional to 2,381.20, 3,286.25 and 1,386.56 is: 1,913.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,381.20 : 3,286.25 = 1,386.56 : x
  2. Step 2: Convert to fraction form
    2,381.20/3,286.25 = 1,386.56/x
  3. Step 3: Cross multiply
    2,381.20x = 3,286.25 × 1,386.56
  4. Step 4: Simplify right side
    2,381.20x = 4,556,589.28
  5. Step 5: Solve for x
    x = 4,556,589.28/2,381.20
  6. Step 6: Final answer
    x = 1,913.57

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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.