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Finding the Fourth Proportional to 447.34, 617.49 and 316.54

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Solution

The fourth proportional to 447.34, 617.49 and 316.54 is: 436.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.34 : 617.49 = 316.54 : x
  2. Step 2: Convert to fraction form
    447.34/617.49 = 316.54/x
  3. Step 3: Cross multiply
    447.34x = 617.49 × 316.54
  4. Step 4: Simplify right side
    447.34x = 195,460.28
  5. Step 5: Solve for x
    x = 195,460.28/447.34
  6. Step 6: Final answer
    x = 436.94

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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.