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Finding the Fourth Proportional to 633.78, 950.97 and 287.21

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Solution

The fourth proportional to 633.78, 950.97 and 287.21 is: 430.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.78 : 950.97 = 287.21 : x
  2. Step 2: Convert to fraction form
    633.78/950.97 = 287.21/x
  3. Step 3: Cross multiply
    633.78x = 950.97 × 287.21
  4. Step 4: Simplify right side
    633.78x = 273,123.34
  5. Step 5: Solve for x
    x = 273,123.34/633.78
  6. Step 6: Final answer
    x = 430.94

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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.