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Finding the Fourth Proportional to 400.82, 601.42 and 309.38

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Solution

The fourth proportional to 400.82, 601.42 and 309.38 is: 464.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.82 : 601.42 = 309.38 : x
  2. Step 2: Convert to fraction form
    400.82/601.42 = 309.38/x
  3. Step 3: Cross multiply
    400.82x = 601.42 × 309.38
  4. Step 4: Simplify right side
    400.82x = 186,067.32
  5. Step 5: Solve for x
    x = 186,067.32/400.82
  6. Step 6: Final answer
    x = 464.22

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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.