Home / 2,144.40-3,214.20-911.60

Finding the Fourth Proportional to 2,144.40, 3,214.20 and 911.60

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Solution

The fourth proportional to 2,144.40, 3,214.20 and 911.60 is: 1,366.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,144.40 : 3,214.20 = 911.60 : x
  2. Step 2: Convert to fraction form
    2,144.40/3,214.20 = 911.60/x
  3. Step 3: Cross multiply
    2,144.40x = 3,214.20 × 911.60
  4. Step 4: Simplify right side
    2,144.40x = 2,930,064.72
  5. Step 5: Solve for x
    x = 2,930,064.72/2,144.40
  6. Step 6: Final answer
    x = 1,366.38

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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.