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Finding the Fourth Proportional to 201.39, 301.56 and 140.64

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Solution

The fourth proportional to 201.39, 301.56 and 140.64 is: 210.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.39 : 301.56 = 140.64 : x
  2. Step 2: Convert to fraction form
    201.39/301.56 = 140.64/x
  3. Step 3: Cross multiply
    201.39x = 301.56 × 140.64
  4. Step 4: Simplify right side
    201.39x = 42,411.40
  5. Step 5: Solve for x
    x = 42,411.40/201.39
  6. Step 6: Final answer
    x = 210.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.