Home / 2,381.88-3,286.16-1,386.80

Finding the Fourth Proportional to 2,381.88, 3,286.16 and 1,386.80

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Solution

The fourth proportional to 2,381.88, 3,286.16 and 1,386.80 is: 1,913.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,381.88 : 3,286.16 = 1,386.80 : x
  2. Step 2: Convert to fraction form
    2,381.88/3,286.16 = 1,386.80/x
  3. Step 3: Cross multiply
    2,381.88x = 3,286.16 × 1,386.80
  4. Step 4: Simplify right side
    2,381.88x = 4,557,246.69
  5. Step 5: Solve for x
    x = 4,557,246.69/2,381.88
  6. Step 6: Final answer
    x = 1,913.30

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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.