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Finding the Fourth Proportional to 238.16, 356.80 and 165.76

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Solution

The fourth proportional to 238.16, 356.80 and 165.76 is: 248.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.16 : 356.80 = 165.76 : x
  2. Step 2: Convert to fraction form
    238.16/356.80 = 165.76/x
  3. Step 3: Cross multiply
    238.16x = 356.80 × 165.76
  4. Step 4: Simplify right side
    238.16x = 59,143.17
  5. Step 5: Solve for x
    x = 59,143.17/238.16
  6. Step 6: Final answer
    x = 248.33

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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.