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Finding the Fourth Proportional to 308.35, 462.58 and 102.90

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Solution

The fourth proportional to 308.35, 462.58 and 102.90 is: 154.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.35 : 462.58 = 102.90 : x
  2. Step 2: Convert to fraction form
    308.35/462.58 = 102.90/x
  3. Step 3: Cross multiply
    308.35x = 462.58 × 102.90
  4. Step 4: Simplify right side
    308.35x = 47,596.65
  5. Step 5: Solve for x
    x = 47,596.65/308.35
  6. Step 6: Final answer
    x = 154.36

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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.