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Finding the Fourth Proportional to 202.60, 278.90 and 181.87

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Solution

The fourth proportional to 202.60, 278.90 and 181.87 is: 250.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.60 : 278.90 = 181.87 : x
  2. Step 2: Convert to fraction form
    202.60/278.90 = 181.87/x
  3. Step 3: Cross multiply
    202.60x = 278.90 × 181.87
  4. Step 4: Simplify right side
    202.60x = 50,724.56
  5. Step 5: Solve for x
    x = 50,724.56/202.60
  6. Step 6: Final answer
    x = 250.36

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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.