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Finding the Fourth Proportional to 626.99, 939.62 and 472.78

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Solution

The fourth proportional to 626.99, 939.62 and 472.78 is: 708.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.99 : 939.62 = 472.78 : x
  2. Step 2: Convert to fraction form
    626.99/939.62 = 472.78/x
  3. Step 3: Cross multiply
    626.99x = 939.62 × 472.78
  4. Step 4: Simplify right side
    626.99x = 444,235.90
  5. Step 5: Solve for x
    x = 444,235.90/626.99
  6. Step 6: Final answer
    x = 708.53

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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.