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Finding the Fourth Proportional to 447.85, 670.69 and 396.55

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Solution

The fourth proportional to 447.85, 670.69 and 396.55 is: 593.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.85 : 670.69 = 396.55 : x
  2. Step 2: Convert to fraction form
    447.85/670.69 = 396.55/x
  3. Step 3: Cross multiply
    447.85x = 670.69 × 396.55
  4. Step 4: Simplify right side
    447.85x = 265,962.12
  5. Step 5: Solve for x
    x = 265,962.12/447.85
  6. Step 6: Final answer
    x = 593.86

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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.