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Finding the Fourth Proportional to 399.73, 600.81 and 391.23

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Solution

The fourth proportional to 399.73, 600.81 and 391.23 is: 588.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.73 : 600.81 = 391.23 : x
  2. Step 2: Convert to fraction form
    399.73/600.81 = 391.23/x
  3. Step 3: Cross multiply
    399.73x = 600.81 × 391.23
  4. Step 4: Simplify right side
    399.73x = 235,054.90
  5. Step 5: Solve for x
    x = 235,054.90/399.73
  6. Step 6: Final answer
    x = 588.03

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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.