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Finding the Fourth Proportional to 399.21, 601.11 and 297.21

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Solution

The fourth proportional to 399.21, 601.11 and 297.21 is: 447.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.21 : 601.11 = 297.21 : x
  2. Step 2: Convert to fraction form
    399.21/601.11 = 297.21/x
  3. Step 3: Cross multiply
    399.21x = 601.11 × 297.21
  4. Step 4: Simplify right side
    399.21x = 178,655.90
  5. Step 5: Solve for x
    x = 178,655.90/399.21
  6. Step 6: Final answer
    x = 447.52

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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.