Home / 2,155.24-3,233.10-839.80

Finding the Fourth Proportional to 2,155.24, 3,233.10 and 839.80

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Solution

The fourth proportional to 2,155.24, 3,233.10 and 839.80 is: 1,259.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.24 : 3,233.10 = 839.80 : x
  2. Step 2: Convert to fraction form
    2,155.24/3,233.10 = 839.80/x
  3. Step 3: Cross multiply
    2,155.24x = 3,233.10 × 839.80
  4. Step 4: Simplify right side
    2,155.24x = 2,715,157.38
  5. Step 5: Solve for x
    x = 2,715,157.38/2,155.24
  6. Step 6: Final answer
    x = 1,259.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.