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Finding the Fourth Proportional to 309.95, 464.75 and 163.55

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Solution

The fourth proportional to 309.95, 464.75 and 163.55 is: 245.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.95 : 464.75 = 163.55 : x
  2. Step 2: Convert to fraction form
    309.95/464.75 = 163.55/x
  3. Step 3: Cross multiply
    309.95x = 464.75 × 163.55
  4. Step 4: Simplify right side
    309.95x = 76,006.72
  5. Step 5: Solve for x
    x = 76,006.72/309.95
  6. Step 6: Final answer
    x = 245.23

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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.