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Finding the Fourth Proportional to 447.35, 621.47 and 443.34

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Solution

The fourth proportional to 447.35, 621.47 and 443.34 is: 615.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.35 : 621.47 = 443.34 : x
  2. Step 2: Convert to fraction form
    447.35/621.47 = 443.34/x
  3. Step 3: Cross multiply
    447.35x = 621.47 × 443.34
  4. Step 4: Simplify right side
    447.35x = 275,520.29
  5. Step 5: Solve for x
    x = 275,520.29/447.35
  6. Step 6: Final answer
    x = 615.90

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.