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Finding the Fourth Proportional to 996.60, 1,375.74 and 908.04

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Solution

The fourth proportional to 996.60, 1,375.74 and 908.04 is: 1,253.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.60 : 1,375.74 = 908.04 : x
  2. Step 2: Convert to fraction form
    996.60/1,375.74 = 908.04/x
  3. Step 3: Cross multiply
    996.60x = 1,375.74 × 908.04
  4. Step 4: Simplify right side
    996.60x = 1,249,226.95
  5. Step 5: Solve for x
    x = 1,249,226.95/996.60
  6. Step 6: Final answer
    x = 1,253.49

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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.