Home / 3,819.28-5,726.12-1,220.72

Finding the Fourth Proportional to 3,819.28, 5,726.12 and 1,220.72

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Solution

The fourth proportional to 3,819.28, 5,726.12 and 1,220.72 is: 1,830.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,819.28 : 5,726.12 = 1,220.72 : x
  2. Step 2: Convert to fraction form
    3,819.28/5,726.12 = 1,220.72/x
  3. Step 3: Cross multiply
    3,819.28x = 5,726.12 × 1,220.72
  4. Step 4: Simplify right side
    3,819.28x = 6,989,989.21
  5. Step 5: Solve for x
    x = 6,989,989.21/3,819.28
  6. Step 6: Final answer
    x = 1,830.19

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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.