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Finding the Fourth Proportional to 494.60, 737.88 and 422

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Solution

The fourth proportional to 494.60, 737.88 and 422 is: 629.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.60 : 737.88 = 422 : x
  2. Step 2: Convert to fraction form
    494.60/737.88 = 422/x
  3. Step 3: Cross multiply
    494.60x = 737.88 × 422
  4. Step 4: Simplify right side
    494.60x = 311,383.25
  5. Step 5: Solve for x
    x = 311,383.25/494.60
  6. Step 6: Final answer
    x = 629.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.