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Finding the Fourth Proportional to 217.32, 300.06 and 142.68

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Solution

The fourth proportional to 217.32, 300.06 and 142.68 is: 197.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.32 : 300.06 = 142.68 : x
  2. Step 2: Convert to fraction form
    217.32/300.06 = 142.68/x
  3. Step 3: Cross multiply
    217.32x = 300.06 × 142.68
  4. Step 4: Simplify right side
    217.32x = 42,812.56
  5. Step 5: Solve for x
    x = 42,812.56/217.32
  6. Step 6: Final answer
    x = 197.00

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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.