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Finding the Fourth Proportional to 626.50, 939.76 and 193.69

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Solution

The fourth proportional to 626.50, 939.76 and 193.69 is: 290.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.50 : 939.76 = 193.69 : x
  2. Step 2: Convert to fraction form
    626.50/939.76 = 193.69/x
  3. Step 3: Cross multiply
    626.50x = 939.76 × 193.69
  4. Step 4: Simplify right side
    626.50x = 182,022.11
  5. Step 5: Solve for x
    x = 182,022.11/626.50
  6. Step 6: Final answer
    x = 290.54

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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.