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Finding the Fourth Proportional to 447.34, 621.47 and 443.33

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Solution

The fourth proportional to 447.34, 621.47 and 443.33 is: 615.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.34 : 621.47 = 443.33 : x
  2. Step 2: Convert to fraction form
    447.34/621.47 = 443.33/x
  3. Step 3: Cross multiply
    447.34x = 621.47 × 443.33
  4. Step 4: Simplify right side
    447.34x = 275,515.63
  5. Step 5: Solve for x
    x = 275,515.63/447.34
  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.