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Finding the Fourth Proportional to 633.41, 950.12 and 428.39

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Solution

The fourth proportional to 633.41, 950.12 and 428.39 is: 642.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.41 : 950.12 = 428.39 : x
  2. Step 2: Convert to fraction form
    633.41/950.12 = 428.39/x
  3. Step 3: Cross multiply
    633.41x = 950.12 × 428.39
  4. Step 4: Simplify right side
    633.41x = 407,015.01
  5. Step 5: Solve for x
    x = 407,015.01/633.41
  6. Step 6: Final answer
    x = 642.58

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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.