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Finding the Fourth Proportional to 994.96, 1,491.27 and 378.27

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Solution

The fourth proportional to 994.96, 1,491.27 and 378.27 is: 566.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.96 : 1,491.27 = 378.27 : x
  2. Step 2: Convert to fraction form
    994.96/1,491.27 = 378.27/x
  3. Step 3: Cross multiply
    994.96x = 1,491.27 × 378.27
  4. Step 4: Simplify right side
    994.96x = 564,102.70
  5. Step 5: Solve for x
    x = 564,102.70/994.96
  6. Step 6: Final answer
    x = 566.96

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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.