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Finding the Fourth Proportional to 309.49, 464.37 and 104.09

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Solution

The fourth proportional to 309.49, 464.37 and 104.09 is: 156.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.49 : 464.37 = 104.09 : x
  2. Step 2: Convert to fraction form
    309.49/464.37 = 104.09/x
  3. Step 3: Cross multiply
    309.49x = 464.37 × 104.09
  4. Step 4: Simplify right side
    309.49x = 48,336.27
  5. Step 5: Solve for x
    x = 48,336.27/309.49
  6. Step 6: Final answer
    x = 156.18

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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.