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Finding the Fourth Proportional to 238.39, 328.68 and 199.10

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Solution

The fourth proportional to 238.39, 328.68 and 199.10 is: 274.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.39 : 328.68 = 199.10 : x
  2. Step 2: Convert to fraction form
    238.39/328.68 = 199.10/x
  3. Step 3: Cross multiply
    238.39x = 328.68 × 199.10
  4. Step 4: Simplify right side
    238.39x = 65,441.01
  5. Step 5: Solve for x
    x = 65,441.01/238.39
  6. Step 6: Final answer
    x = 274.52

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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.