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Finding the Fourth Proportional to 994.73, 1,372.12 and 658.62

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Solution

The fourth proportional to 994.73, 1,372.12 and 658.62 is: 908.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.73 : 1,372.12 = 658.62 : x
  2. Step 2: Convert to fraction form
    994.73/1,372.12 = 658.62/x
  3. Step 3: Cross multiply
    994.73x = 1,372.12 × 658.62
  4. Step 4: Simplify right side
    994.73x = 903,704.03
  5. Step 5: Solve for x
    x = 903,704.03/994.73
  6. Step 6: Final answer
    x = 908.50

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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.