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Finding the Fourth Proportional to 234.72, 352.35 and 143.46

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Solution

The fourth proportional to 234.72, 352.35 and 143.46 is: 215.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.72 : 352.35 = 143.46 : x
  2. Step 2: Convert to fraction form
    234.72/352.35 = 143.46/x
  3. Step 3: Cross multiply
    234.72x = 352.35 × 143.46
  4. Step 4: Simplify right side
    234.72x = 50,548.13
  5. Step 5: Solve for x
    x = 50,548.13/234.72
  6. Step 6: Final answer
    x = 215.36

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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.