Home / 3,902.22-5,385.38-2,223.70

Finding the Fourth Proportional to 3,902.22, 5,385.38 and 2,223.70

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Solution

The fourth proportional to 3,902.22, 5,385.38 and 2,223.70 is: 3,068.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,902.22 : 5,385.38 = 2,223.70 : x
  2. Step 2: Convert to fraction form
    3,902.22/5,385.38 = 2,223.70/x
  3. Step 3: Cross multiply
    3,902.22x = 5,385.38 × 2,223.70
  4. Step 4: Simplify right side
    3,902.22x = 11,975,469.51
  5. Step 5: Solve for x
    x = 11,975,469.51/3,902.22
  6. Step 6: Final answer
    x = 3,068.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.