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Finding the Fourth Proportional to 473.24, 654.28 and 399.43

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Solution

The fourth proportional to 473.24, 654.28 and 399.43 is: 552.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.24 : 654.28 = 399.43 : x
  2. Step 2: Convert to fraction form
    473.24/654.28 = 399.43/x
  3. Step 3: Cross multiply
    473.24x = 654.28 × 399.43
  4. Step 4: Simplify right side
    473.24x = 261,338.88
  5. Step 5: Solve for x
    x = 261,338.88/473.24
  6. Step 6: Final answer
    x = 552.23

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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.