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Finding the Fourth Proportional to 994.11, 1,491.36 and 344.85

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Solution

The fourth proportional to 994.11, 1,491.36 and 344.85 is: 517.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.11 : 1,491.36 = 344.85 : x
  2. Step 2: Convert to fraction form
    994.11/1,491.36 = 344.85/x
  3. Step 3: Cross multiply
    994.11x = 1,491.36 × 344.85
  4. Step 4: Simplify right side
    994.11x = 514,288.04
  5. Step 5: Solve for x
    x = 514,288.04/994.11
  6. Step 6: Final answer
    x = 517.34

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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.