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Finding the Fourth Proportional to 238.13, 328.44 and 155.27

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Solution

The fourth proportional to 238.13, 328.44 and 155.27 is: 214.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.13 : 328.44 = 155.27 : x
  2. Step 2: Convert to fraction form
    238.13/328.44 = 155.27/x
  3. Step 3: Cross multiply
    238.13x = 328.44 × 155.27
  4. Step 4: Simplify right side
    238.13x = 50,994.65
  5. Step 5: Solve for x
    x = 50,994.65/238.13
  6. Step 6: Final answer
    x = 214.14

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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.