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Finding the Fourth Proportional to 238.13, 328.62 and 154.19

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Solution

The fourth proportional to 238.13, 328.62 and 154.19 is: 212.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.13 : 328.62 = 154.19 : x
  2. Step 2: Convert to fraction form
    238.13/328.62 = 154.19/x
  3. Step 3: Cross multiply
    238.13x = 328.62 × 154.19
  4. Step 4: Simplify right side
    238.13x = 50,669.92
  5. Step 5: Solve for x
    x = 50,669.92/238.13
  6. Step 6: Final answer
    x = 212.78

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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.