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Finding the Fourth Proportional to 995.11, 1,372.29 and 658.86

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Solution

The fourth proportional to 995.11, 1,372.29 and 658.86 is: 908.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    995.11 : 1,372.29 = 658.86 : x
  2. Step 2: Convert to fraction form
    995.11/1,372.29 = 658.86/x
  3. Step 3: Cross multiply
    995.11x = 1,372.29 × 658.86
  4. Step 4: Simplify right side
    995.11x = 904,144.31
  5. Step 5: Solve for x
    x = 904,144.31/995.11
  6. Step 6: Final answer
    x = 908.59

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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.