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Finding the Fourth Proportional to 201.98, 278.80 and 119.10

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Solution

The fourth proportional to 201.98, 278.80 and 119.10 is: 164.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.98 : 278.80 = 119.10 : x
  2. Step 2: Convert to fraction form
    201.98/278.80 = 119.10/x
  3. Step 3: Cross multiply
    201.98x = 278.80 × 119.10
  4. Step 4: Simplify right side
    201.98x = 33,205.08
  5. Step 5: Solve for x
    x = 33,205.08/201.98
  6. Step 6: Final answer
    x = 164.40

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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.