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Finding the Fourth Proportional to 605.94, 908.90 and 423.69

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Solution

The fourth proportional to 605.94, 908.90 and 423.69 is: 635.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.94 : 908.90 = 423.69 : x
  2. Step 2: Convert to fraction form
    605.94/908.90 = 423.69/x
  3. Step 3: Cross multiply
    605.94x = 908.90 × 423.69
  4. Step 4: Simplify right side
    605.94x = 385,091.84
  5. Step 5: Solve for x
    x = 385,091.84/605.94
  6. Step 6: Final answer
    x = 635.53

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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.