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Finding the Fourth Proportional to 633.91, 950.80 and 429.79

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Solution

The fourth proportional to 633.91, 950.80 and 429.79 is: 644.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.91 : 950.80 = 429.79 : x
  2. Step 2: Convert to fraction form
    633.91/950.80 = 429.79/x
  3. Step 3: Cross multiply
    633.91x = 950.80 × 429.79
  4. Step 4: Simplify right side
    633.91x = 408,644.33
  5. Step 5: Solve for x
    x = 408,644.33/633.91
  6. Step 6: Final answer
    x = 644.64

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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.