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Finding the Fourth Proportional to 506.72, 698.74 and 329.55

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Solution

The fourth proportional to 506.72, 698.74 and 329.55 is: 454.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.72 : 698.74 = 329.55 : x
  2. Step 2: Convert to fraction form
    506.72/698.74 = 329.55/x
  3. Step 3: Cross multiply
    506.72x = 698.74 × 329.55
  4. Step 4: Simplify right side
    506.72x = 230,272.11
  5. Step 5: Solve for x
    x = 230,272.11/506.72
  6. Step 6: Final answer
    x = 454.43

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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.