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Finding the Fourth Proportional to 447.94, 619.08 and 393.91

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Solution

The fourth proportional to 447.94, 619.08 and 393.91 is: 544.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.94 : 619.08 = 393.91 : x
  2. Step 2: Convert to fraction form
    447.94/619.08 = 393.91/x
  3. Step 3: Cross multiply
    447.94x = 619.08 × 393.91
  4. Step 4: Simplify right side
    447.94x = 243,861.80
  5. Step 5: Solve for x
    x = 243,861.80/447.94
  6. Step 6: Final answer
    x = 544.41

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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.