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Finding the Fourth Proportional to 202.90, 280.09 and 166.45

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Solution

The fourth proportional to 202.90, 280.09 and 166.45 is: 229.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.90 : 280.09 = 166.45 : x
  2. Step 2: Convert to fraction form
    202.90/280.09 = 166.45/x
  3. Step 3: Cross multiply
    202.90x = 280.09 × 166.45
  4. Step 4: Simplify right side
    202.90x = 46,620.98
  5. Step 5: Solve for x
    x = 46,620.98/202.90
  6. Step 6: Final answer
    x = 229.77

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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.