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Finding the Fourth Proportional to 309.85, 465.03 and 163.60

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Solution

The fourth proportional to 309.85, 465.03 and 163.60 is: 245.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.85 : 465.03 = 163.60 : x
  2. Step 2: Convert to fraction form
    309.85/465.03 = 163.60/x
  3. Step 3: Cross multiply
    309.85x = 465.03 × 163.60
  4. Step 4: Simplify right side
    309.85x = 76,077.75
  5. Step 5: Solve for x
    x = 76,077.75/309.85
  6. Step 6: Final answer
    x = 245.53

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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.