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Finding the Fourth Proportional to 626.07, 938.82 and 215.07

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Solution

The fourth proportional to 626.07, 938.82 and 215.07 is: 322.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.07 : 938.82 = 215.07 : x
  2. Step 2: Convert to fraction form
    626.07/938.82 = 215.07/x
  3. Step 3: Cross multiply
    626.07x = 938.82 × 215.07
  4. Step 4: Simplify right side
    626.07x = 201,912.02
  5. Step 5: Solve for x
    x = 201,912.02/626.07
  6. Step 6: Final answer
    x = 322.51

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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.