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Finding the Fourth Proportional to 1,469.21, 2,028.13 and 879.62

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Solution

The fourth proportional to 1,469.21, 2,028.13 and 879.62 is: 1,214.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,469.21 : 2,028.13 = 879.62 : x
  2. Step 2: Convert to fraction form
    1,469.21/2,028.13 = 879.62/x
  3. Step 3: Cross multiply
    1,469.21x = 2,028.13 × 879.62
  4. Step 4: Simplify right side
    1,469.21x = 1,783,971.37
  5. Step 5: Solve for x
    x = 1,783,971.37/1,469.21
  6. Step 6: Final answer
    x = 1,214.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.