Home / 3,902.30-5,385.30-2,223.78

Finding the Fourth Proportional to 3,902.30, 5,385.30 and 2,223.78

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Solution

The fourth proportional to 3,902.30, 5,385.30 and 2,223.78 is: 3,068.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,902.30 : 5,385.30 = 2,223.78 : x
  2. Step 2: Convert to fraction form
    3,902.30/5,385.30 = 2,223.78/x
  3. Step 3: Cross multiply
    3,902.30x = 5,385.30 × 2,223.78
  4. Step 4: Simplify right side
    3,902.30x = 11,975,722.43
  5. Step 5: Solve for x
    x = 11,975,722.43/3,902.30
  6. Step 6: Final answer
    x = 3,068.89

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1.5x scale

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.