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Finding the Fourth Proportional to 447.72, 619 and 427.92

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Solution

The fourth proportional to 447.72, 619 and 427.92 is: 591.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.72 : 619 = 427.92 : x
  2. Step 2: Convert to fraction form
    447.72/619 = 427.92/x
  3. Step 3: Cross multiply
    447.72x = 619 × 427.92
  4. Step 4: Simplify right side
    447.72x = 264,882.48
  5. Step 5: Solve for x
    x = 264,882.48/447.72
  6. Step 6: Final answer
    x = 591.63

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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.