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Finding the Fourth Proportional to 1,375.21, 2,062.34 and 553.27

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Solution

The fourth proportional to 1,375.21, 2,062.34 and 553.27 is: 829.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375.21 : 2,062.34 = 553.27 : x
  2. Step 2: Convert to fraction form
    1,375.21/2,062.34 = 553.27/x
  3. Step 3: Cross multiply
    1,375.21x = 2,062.34 × 553.27
  4. Step 4: Simplify right side
    1,375.21x = 1,141,028.09
  5. Step 5: Solve for x
    x = 1,141,028.09/1,375.21
  6. Step 6: Final answer
    x = 829.71

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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.