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Finding the Fourth Proportional to 236.12, 325.74 and 157.42

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Solution

The fourth proportional to 236.12, 325.74 and 157.42 is: 217.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.12 : 325.74 = 157.42 : x
  2. Step 2: Convert to fraction form
    236.12/325.74 = 157.42/x
  3. Step 3: Cross multiply
    236.12x = 325.74 × 157.42
  4. Step 4: Simplify right side
    236.12x = 51,275.58
  5. Step 5: Solve for x
    x = 51,275.58/236.12
  6. Step 6: Final answer
    x = 217.16

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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.