Home / 2,209.79-3,311.66-1,221.13

Finding the Fourth Proportional to 2,209.79, 3,311.66 and 1,221.13

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Solution

The fourth proportional to 2,209.79, 3,311.66 and 1,221.13 is: 1,830.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,209.79 : 3,311.66 = 1,221.13 : x
  2. Step 2: Convert to fraction form
    2,209.79/3,311.66 = 1,221.13/x
  3. Step 3: Cross multiply
    2,209.79x = 3,311.66 × 1,221.13
  4. Step 4: Simplify right side
    2,209.79x = 4,043,967.38
  5. Step 5: Solve for x
    x = 4,043,967.38/2,209.79
  6. Step 6: Final answer
    x = 1,830.02

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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.