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Finding the Fourth Proportional to 634.16, 950.59 and 428.75

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Solution

The fourth proportional to 634.16, 950.59 and 428.75 is: 642.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.16 : 950.59 = 428.75 : x
  2. Step 2: Convert to fraction form
    634.16/950.59 = 428.75/x
  3. Step 3: Cross multiply
    634.16x = 950.59 × 428.75
  4. Step 4: Simplify right side
    634.16x = 407,558.57
  5. Step 5: Solve for x
    x = 407,558.57/634.16
  6. Step 6: Final answer
    x = 642.68

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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.