Home / 2,813.90-4,220.04-839.44

Finding the Fourth Proportional to 2,813.90, 4,220.04 and 839.44

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Solution

The fourth proportional to 2,813.90, 4,220.04 and 839.44 is: 1,258.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,813.90 : 4,220.04 = 839.44 : x
  2. Step 2: Convert to fraction form
    2,813.90/4,220.04 = 839.44/x
  3. Step 3: Cross multiply
    2,813.90x = 4,220.04 × 839.44
  4. Step 4: Simplify right side
    2,813.90x = 3,542,470.38
  5. Step 5: Solve for x
    x = 3,542,470.38/2,813.90
  6. Step 6: Final answer
    x = 1,258.92

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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.