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Finding the Fourth Proportional to 309.80, 464.45 and 163.52

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Solution

The fourth proportional to 309.80, 464.45 and 163.52 is: 245.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.80 : 464.45 = 163.52 : x
  2. Step 2: Convert to fraction form
    309.80/464.45 = 163.52/x
  3. Step 3: Cross multiply
    309.80x = 464.45 × 163.52
  4. Step 4: Simplify right side
    309.80x = 75,943.72
  5. Step 5: Solve for x
    x = 75,943.72/309.80
  6. Step 6: Final answer
    x = 245.14

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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.