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Finding the Fourth Proportional to 626.09, 938.09 and 317.30

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Solution

The fourth proportional to 626.09, 938.09 and 317.30 is: 475.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.09 : 938.09 = 317.30 : x
  2. Step 2: Convert to fraction form
    626.09/938.09 = 317.30/x
  3. Step 3: Cross multiply
    626.09x = 938.09 × 317.30
  4. Step 4: Simplify right side
    626.09x = 297,649.68
  5. Step 5: Solve for x
    x = 297,649.68/626.09
  6. Step 6: Final answer
    x = 475.41

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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.