Home / 2,214.20-3,318.60-980.30

Finding the Fourth Proportional to 2,214.20, 3,318.60 and 980.30

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Solution

The fourth proportional to 2,214.20, 3,318.60 and 980.30 is: 1,469.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,214.20 : 3,318.60 = 980.30 : x
  2. Step 2: Convert to fraction form
    2,214.20/3,318.60 = 980.30/x
  3. Step 3: Cross multiply
    2,214.20x = 3,318.60 × 980.30
  4. Step 4: Simplify right side
    2,214.20x = 3,253,223.58
  5. Step 5: Solve for x
    x = 3,253,223.58/2,214.20
  6. Step 6: Final answer
    x = 1,469.25

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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.