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Finding the Fourth Proportional to 852.15, 1,279.04 and 669.09

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Solution

The fourth proportional to 852.15, 1,279.04 and 669.09 is: 1,004.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    852.15 : 1,279.04 = 669.09 : x
  2. Step 2: Convert to fraction form
    852.15/1,279.04 = 669.09/x
  3. Step 3: Cross multiply
    852.15x = 1,279.04 × 669.09
  4. Step 4: Simplify right side
    852.15x = 855,789.53
  5. Step 5: Solve for x
    x = 855,789.53/852.15
  6. Step 6: Final answer
    x = 1,004.27

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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.