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Finding the Fourth Proportional to 494.78, 683.08 and 329.22

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Solution

The fourth proportional to 494.78, 683.08 and 329.22 is: 454.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.78 : 683.08 = 329.22 : x
  2. Step 2: Convert to fraction form
    494.78/683.08 = 329.22/x
  3. Step 3: Cross multiply
    494.78x = 683.08 × 329.22
  4. Step 4: Simplify right side
    494.78x = 224,883.60
  5. Step 5: Solve for x
    x = 224,883.60/494.78
  6. Step 6: Final answer
    x = 454.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.