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Finding the Fourth Proportional to 202.14, 280.24 and 191.20

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Solution

The fourth proportional to 202.14, 280.24 and 191.20 is: 265.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.14 : 280.24 = 191.20 : x
  2. Step 2: Convert to fraction form
    202.14/280.24 = 191.20/x
  3. Step 3: Cross multiply
    202.14x = 280.24 × 191.20
  4. Step 4: Simplify right side
    202.14x = 53,581.89
  5. Step 5: Solve for x
    x = 53,581.89/202.14
  6. Step 6: Final answer
    x = 265.07

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.