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Finding the Fourth Proportional to 401.43, 553.78 and 235.54

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Solution

The fourth proportional to 401.43, 553.78 and 235.54 is: 324.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.43 : 553.78 = 235.54 : x
  2. Step 2: Convert to fraction form
    401.43/553.78 = 235.54/x
  3. Step 3: Cross multiply
    401.43x = 553.78 × 235.54
  4. Step 4: Simplify right side
    401.43x = 130,437.34
  5. Step 5: Solve for x
    x = 130,437.34/401.43
  6. Step 6: Final answer
    x = 324.93

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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.