Home / 3,819.12-5,728.26-1,221.72

Finding the Fourth Proportional to 3,819.12, 5,728.26 and 1,221.72

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Solution

The fourth proportional to 3,819.12, 5,728.26 and 1,221.72 is: 1,832.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,819.12 : 5,728.26 = 1,221.72 : x
  2. Step 2: Convert to fraction form
    3,819.12/5,728.26 = 1,221.72/x
  3. Step 3: Cross multiply
    3,819.12x = 5,728.26 × 1,221.72
  4. Step 4: Simplify right side
    3,819.12x = 6,998,329.81
  5. Step 5: Solve for x
    x = 6,998,329.81/3,819.12
  6. Step 6: Final answer
    x = 1,832.45

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1.5x scale

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.