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Finding the Fourth Proportional to 478.33, 716.91 and 422.97

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Solution

The fourth proportional to 478.33, 716.91 and 422.97 is: 633.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.33 : 716.91 = 422.97 : x
  2. Step 2: Convert to fraction form
    478.33/716.91 = 422.97/x
  3. Step 3: Cross multiply
    478.33x = 716.91 × 422.97
  4. Step 4: Simplify right side
    478.33x = 303,231.42
  5. Step 5: Solve for x
    x = 303,231.42/478.33
  6. Step 6: Final answer
    x = 633.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.