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Finding the Fourth Proportional to 212.82, 318.66 and 157.62

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Solution

The fourth proportional to 212.82, 318.66 and 157.62 is: 236.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.82 : 318.66 = 157.62 : x
  2. Step 2: Convert to fraction form
    212.82/318.66 = 157.62/x
  3. Step 3: Cross multiply
    212.82x = 318.66 × 157.62
  4. Step 4: Simplify right side
    212.82x = 50,227.19
  5. Step 5: Solve for x
    x = 50,227.19/212.82
  6. Step 6: Final answer
    x = 236.01

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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.