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Finding the Fourth Proportional to 465.76, 698.46 and 205.66

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Solution

The fourth proportional to 465.76, 698.46 and 205.66 is: 308.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.76 : 698.46 = 205.66 : x
  2. Step 2: Convert to fraction form
    465.76/698.46 = 205.66/x
  3. Step 3: Cross multiply
    465.76x = 698.46 × 205.66
  4. Step 4: Simplify right side
    465.76x = 143,645.28
  5. Step 5: Solve for x
    x = 143,645.28/465.76
  6. Step 6: Final answer
    x = 308.41

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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.