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Finding the Fourth Proportional to 400.97, 553.41 and 235.15

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Solution

The fourth proportional to 400.97, 553.41 and 235.15 is: 324.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.97 : 553.41 = 235.15 : x
  2. Step 2: Convert to fraction form
    400.97/553.41 = 235.15/x
  3. Step 3: Cross multiply
    400.97x = 553.41 × 235.15
  4. Step 4: Simplify right side
    400.97x = 130,134.36
  5. Step 5: Solve for x
    x = 130,134.36/400.97
  6. Step 6: Final answer
    x = 324.55

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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.