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Finding the Fourth Proportional to 465.51, 698.28 and 205.56

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Solution

The fourth proportional to 465.51, 698.28 and 205.56 is: 308.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.51 : 698.28 = 205.56 : x
  2. Step 2: Convert to fraction form
    465.51/698.28 = 205.56/x
  3. Step 3: Cross multiply
    465.51x = 698.28 × 205.56
  4. Step 4: Simplify right side
    465.51x = 143,538.44
  5. Step 5: Solve for x
    x = 143,538.44/465.51
  6. Step 6: Final answer
    x = 308.35

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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.