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Finding the Fourth Proportional to 994.38, 1,491.06 and 628.38

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Solution

The fourth proportional to 994.38, 1,491.06 and 628.38 is: 942.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.38 : 1,491.06 = 628.38 : x
  2. Step 2: Convert to fraction form
    994.38/1,491.06 = 628.38/x
  3. Step 3: Cross multiply
    994.38x = 1,491.06 × 628.38
  4. Step 4: Simplify right side
    994.38x = 936,952.28
  5. Step 5: Solve for x
    x = 936,952.28/994.38
  6. Step 6: Final answer
    x = 942.25

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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.