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Finding the Fourth Proportional to 2,154.06, 3,229.64 and 748.12

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Solution

The fourth proportional to 2,154.06, 3,229.64 and 748.12 is: 1,121.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,154.06 : 3,229.64 = 748.12 : x
  2. Step 2: Convert to fraction form
    2,154.06/3,229.64 = 748.12/x
  3. Step 3: Cross multiply
    2,154.06x = 3,229.64 × 748.12
  4. Step 4: Simplify right side
    2,154.06x = 2,416,150.09
  5. Step 5: Solve for x
    x = 2,416,150.09/2,154.06
  6. Step 6: Final answer
    x = 1,121.67

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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.