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Finding the Fourth Proportional to 201.72, 278.20 and 146.64

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Solution

The fourth proportional to 201.72, 278.20 and 146.64 is: 202.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.72 : 278.20 = 146.64 : x
  2. Step 2: Convert to fraction form
    201.72/278.20 = 146.64/x
  3. Step 3: Cross multiply
    201.72x = 278.20 × 146.64
  4. Step 4: Simplify right side
    201.72x = 40,795.25
  5. Step 5: Solve for x
    x = 40,795.25/201.72
  6. Step 6: Final answer
    x = 202.24

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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.