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Finding the Fourth Proportional to 308.11, 461.95 and 102.65

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Solution

The fourth proportional to 308.11, 461.95 and 102.65 is: 153.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.11 : 461.95 = 102.65 : x
  2. Step 2: Convert to fraction form
    308.11/461.95 = 102.65/x
  3. Step 3: Cross multiply
    308.11x = 461.95 × 102.65
  4. Step 4: Simplify right side
    308.11x = 47,420.07
  5. Step 5: Solve for x
    x = 47,420.07/308.11
  6. Step 6: Final answer
    x = 153.91

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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.