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Finding the Fourth Proportional to 238.02, 328.18 and 155.09

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Solution

The fourth proportional to 238.02, 328.18 and 155.09 is: 213.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.02 : 328.18 = 155.09 : x
  2. Step 2: Convert to fraction form
    238.02/328.18 = 155.09/x
  3. Step 3: Cross multiply
    238.02x = 328.18 × 155.09
  4. Step 4: Simplify right side
    238.02x = 50,897.44
  5. Step 5: Solve for x
    x = 50,897.44/238.02
  6. Step 6: Final answer
    x = 213.84

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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.