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Finding the Fourth Proportional to 309.10, 461.41 and 308.38

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Solution

The fourth proportional to 309.10, 461.41 and 308.38 is: 460.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.10 : 461.41 = 308.38 : x
  2. Step 2: Convert to fraction form
    309.10/461.41 = 308.38/x
  3. Step 3: Cross multiply
    309.10x = 461.41 × 308.38
  4. Step 4: Simplify right side
    309.10x = 142,289.62
  5. Step 5: Solve for x
    x = 142,289.62/309.10
  6. Step 6: Final answer
    x = 460.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.