Home / 2,155.90-3,233.01-839.46

Finding the Fourth Proportional to 2,155.90, 3,233.01 and 839.46

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Solution

The fourth proportional to 2,155.90, 3,233.01 and 839.46 is: 1,258.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.90 : 3,233.01 = 839.46 : x
  2. Step 2: Convert to fraction form
    2,155.90/3,233.01 = 839.46/x
  3. Step 3: Cross multiply
    2,155.90x = 3,233.01 × 839.46
  4. Step 4: Simplify right side
    2,155.90x = 2,713,997.85
  5. Step 5: Solve for x
    x = 2,713,997.85/2,155.90
  6. Step 6: Final answer
    x = 1,258.87

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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.