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Finding the Fourth Proportional to 206.76, 309.69 and 202.61

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Solution

The fourth proportional to 206.76, 309.69 and 202.61 is: 303.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.76 : 309.69 = 202.61 : x
  2. Step 2: Convert to fraction form
    206.76/309.69 = 202.61/x
  3. Step 3: Cross multiply
    206.76x = 309.69 × 202.61
  4. Step 4: Simplify right side
    206.76x = 62,747.07
  5. Step 5: Solve for x
    x = 62,747.07/206.76
  6. Step 6: Final answer
    x = 303.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.