Home / 3,781.40-5,216.22-2,381.72

Finding the Fourth Proportional to 3,781.40, 5,216.22 and 2,381.72

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Solution

The fourth proportional to 3,781.40, 5,216.22 and 2,381.72 is: 3,285.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.40 : 5,216.22 = 2,381.72 : x
  2. Step 2: Convert to fraction form
    3,781.40/5,216.22 = 2,381.72/x
  3. Step 3: Cross multiply
    3,781.40x = 5,216.22 × 2,381.72
  4. Step 4: Simplify right side
    3,781.40x = 12,423,575.50
  5. Step 5: Solve for x
    x = 12,423,575.50/3,781.40
  6. Step 6: Final answer
    x = 3,285.44

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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.