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Finding the Fourth Proportional to 908.22, 1,369.97 and 879.06

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Solution

The fourth proportional to 908.22, 1,369.97 and 879.06 is: 1,325.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.22 : 1,369.97 = 879.06 : x
  2. Step 2: Convert to fraction form
    908.22/1,369.97 = 879.06/x
  3. Step 3: Cross multiply
    908.22x = 1,369.97 × 879.06
  4. Step 4: Simplify right side
    908.22x = 1,204,281.43
  5. Step 5: Solve for x
    x = 1,204,281.43/908.22
  6. Step 6: Final answer
    x = 1,325.98

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.