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Finding the Fourth Proportional to 626.24, 939.38 and 317.22

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Solution

The fourth proportional to 626.24, 939.38 and 317.22 is: 475.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.24 : 939.38 = 317.22 : x
  2. Step 2: Convert to fraction form
    626.24/939.38 = 317.22/x
  3. Step 3: Cross multiply
    626.24x = 939.38 × 317.22
  4. Step 4: Simplify right side
    626.24x = 297,988.54
  5. Step 5: Solve for x
    x = 297,988.54/626.24
  6. Step 6: Final answer
    x = 475.84

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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.