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Finding the Fourth Proportional to 309.33, 464.13 and 308.79

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Solution

The fourth proportional to 309.33, 464.13 and 308.79 is: 463.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.33 : 464.13 = 308.79 : x
  2. Step 2: Convert to fraction form
    309.33/464.13 = 308.79/x
  3. Step 3: Cross multiply
    309.33x = 464.13 × 308.79
  4. Step 4: Simplify right side
    309.33x = 143,318.70
  5. Step 5: Solve for x
    x = 143,318.70/309.33
  6. Step 6: Final answer
    x = 463.32

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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.