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Finding the Fourth Proportional to 401.51, 605.34 and 396.33

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Solution

The fourth proportional to 401.51, 605.34 and 396.33 is: 597.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.51 : 605.34 = 396.33 : x
  2. Step 2: Convert to fraction form
    401.51/605.34 = 396.33/x
  3. Step 3: Cross multiply
    401.51x = 605.34 × 396.33
  4. Step 4: Simplify right side
    401.51x = 239,912.13
  5. Step 5: Solve for x
    x = 239,912.13/401.51
  6. Step 6: Final answer
    x = 597.53

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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.