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Finding the Fourth Proportional to 447.12, 673.11 and 402.47

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Solution

The fourth proportional to 447.12, 673.11 and 402.47 is: 605.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    447.12 : 673.11 = 402.47 : x
  2. Step 2: Convert to fraction form
    447.12/673.11 = 402.47/x
  3. Step 3: Cross multiply
    447.12x = 673.11 × 402.47
  4. Step 4: Simplify right side
    447.12x = 270,905.74
  5. Step 5: Solve for x
    x = 270,905.74/447.12
  6. Step 6: Final answer
    x = 605.89

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.