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Finding the Fourth Proportional to 236.31, 325.64 and 157.55

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Solution

The fourth proportional to 236.31, 325.64 and 157.55 is: 217.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    236.31 : 325.64 = 157.55 : x
  2. Step 2: Convert to fraction form
    236.31/325.64 = 157.55/x
  3. Step 3: Cross multiply
    236.31x = 325.64 × 157.55
  4. Step 4: Simplify right side
    236.31x = 51,302.17
  5. Step 5: Solve for x
    x = 51,302.17/236.31
  6. Step 6: Final answer
    x = 217.10

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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.