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Finding the Fourth Proportional to 997.67, 1,491.87 and 888.62

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Solution

The fourth proportional to 997.67, 1,491.87 and 888.62 is: 1,328.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.67 : 1,491.87 = 888.62 : x
  2. Step 2: Convert to fraction form
    997.67/1,491.87 = 888.62/x
  3. Step 3: Cross multiply
    997.67x = 1,491.87 × 888.62
  4. Step 4: Simplify right side
    997.67x = 1,325,704.79
  5. Step 5: Solve for x
    x = 1,325,704.79/997.67
  6. Step 6: Final answer
    x = 1,328.81

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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.