Home / 3,781.96-5,215.38-2,384.20

Finding the Fourth Proportional to 3,781.96, 5,215.38 and 2,384.20

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Solution

The fourth proportional to 3,781.96, 5,215.38 and 2,384.20 is: 3,287.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.96 : 5,215.38 = 2,384.20 : x
  2. Step 2: Convert to fraction form
    3,781.96/5,215.38 = 2,384.20/x
  3. Step 3: Cross multiply
    3,781.96x = 5,215.38 × 2,384.20
  4. Step 4: Simplify right side
    3,781.96x = 12,434,509.00
  5. Step 5: Solve for x
    x = 12,434,509.00/3,781.96
  6. Step 6: Final answer
    x = 3,287.85

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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.