Home / 2,381.24-3,286.11-1,387.20

Finding the Fourth Proportional to 2,381.24, 3,286.11 and 1,387.20

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Solution

The fourth proportional to 2,381.24, 3,286.11 and 1,387.20 is: 1,914.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,381.24 : 3,286.11 = 1,387.20 : x
  2. Step 2: Convert to fraction form
    2,381.24/3,286.11 = 1,387.20/x
  3. Step 3: Cross multiply
    2,381.24x = 3,286.11 × 1,387.20
  4. Step 4: Simplify right side
    2,381.24x = 4,558,484.67
  5. Step 5: Solve for x
    x = 4,558,484.67/2,381.24
  6. Step 6: Final answer
    x = 1,914.34

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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.