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Finding the Fourth Proportional to 143.45, 215.28 and 134.34

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Solution

The fourth proportional to 143.45, 215.28 and 134.34 is: 201.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.45 : 215.28 = 134.34 : x
  2. Step 2: Convert to fraction form
    143.45/215.28 = 134.34/x
  3. Step 3: Cross multiply
    143.45x = 215.28 × 134.34
  4. Step 4: Simplify right side
    143.45x = 28,920.72
  5. Step 5: Solve for x
    x = 28,920.72/143.45
  6. Step 6: Final answer
    x = 201.61

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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.