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Finding the Fourth Proportional to 633.70, 950.09 and 427.76

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Solution

The fourth proportional to 633.70, 950.09 and 427.76 is: 641.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.70 : 950.09 = 427.76 : x
  2. Step 2: Convert to fraction form
    633.70/950.09 = 427.76/x
  3. Step 3: Cross multiply
    633.70x = 950.09 × 427.76
  4. Step 4: Simplify right side
    633.70x = 406,403.61
  5. Step 5: Solve for x
    x = 406,403.61/633.70
  6. Step 6: Final answer
    x = 641.32

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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.