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Finding the Fourth Proportional to 699.33, 1,049.15 and 205.76

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Solution

The fourth proportional to 699.33, 1,049.15 and 205.76 is: 308.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.33 : 1,049.15 = 205.76 : x
  2. Step 2: Convert to fraction form
    699.33/1,049.15 = 205.76/x
  3. Step 3: Cross multiply
    699.33x = 1,049.15 × 205.76
  4. Step 4: Simplify right side
    699.33x = 215,876.24
  5. Step 5: Solve for x
    x = 215,876.24/699.33
  6. Step 6: Final answer
    x = 308.69

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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.