Home / 3,902.85-5,386.28-2,223.91

Finding the Fourth Proportional to 3,902.85, 5,386.28 and 2,223.91

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Solution

The fourth proportional to 3,902.85, 5,386.28 and 2,223.91 is: 3,069.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,902.85 : 5,386.28 = 2,223.91 : x
  2. Step 2: Convert to fraction form
    3,902.85/5,386.28 = 2,223.91/x
  3. Step 3: Cross multiply
    3,902.85x = 5,386.28 × 2,223.91
  4. Step 4: Simplify right side
    3,902.85x = 11,978,579.78
  5. Step 5: Solve for x
    x = 11,978,579.78/3,902.85
  6. Step 6: Final answer
    x = 3,069.19

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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.