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Finding the Fourth Proportional to 1,469.21, 2,200.44 and 818.51

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Solution

The fourth proportional to 1,469.21, 2,200.44 and 818.51 is: 1,225.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,469.21 : 2,200.44 = 818.51 : x
  2. Step 2: Convert to fraction form
    1,469.21/2,200.44 = 818.51/x
  3. Step 3: Cross multiply
    1,469.21x = 2,200.44 × 818.51
  4. Step 4: Simplify right side
    1,469.21x = 1,801,082.14
  5. Step 5: Solve for x
    x = 1,801,082.14/1,469.21
  6. Step 6: Final answer
    x = 1,225.88

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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.