Home / 2,381.74-3,286.81-1,387.70

Finding the Fourth Proportional to 2,381.74, 3,286.81 and 1,387.70

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Solution

The fourth proportional to 2,381.74, 3,286.81 and 1,387.70 is: 1,915.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,381.74 : 3,286.81 = 1,387.70 : x
  2. Step 2: Convert to fraction form
    2,381.74/3,286.81 = 1,387.70/x
  3. Step 3: Cross multiply
    2,381.74x = 3,286.81 × 1,387.70
  4. Step 4: Simplify right side
    2,381.74x = 4,561,082.86
  5. Step 5: Solve for x
    x = 4,561,082.86/2,381.74
  6. Step 6: Final answer
    x = 1,915.03

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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.