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Finding the Fourth Proportional to 269.30, 370.80 and 203.70

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Solution

The fourth proportional to 269.30, 370.80 and 203.70 is: 280.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.30 : 370.80 = 203.70 : x
  2. Step 2: Convert to fraction form
    269.30/370.80 = 203.70/x
  3. Step 3: Cross multiply
    269.30x = 370.80 × 203.70
  4. Step 4: Simplify right side
    269.30x = 75,531.96
  5. Step 5: Solve for x
    x = 75,531.96/269.30
  6. Step 6: Final answer
    x = 280.48

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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.