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Finding the Fourth Proportional to 308.50, 462.90 and 146.18

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Solution

The fourth proportional to 308.50, 462.90 and 146.18 is: 219.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.50 : 462.90 = 146.18 : x
  2. Step 2: Convert to fraction form
    308.50/462.90 = 146.18/x
  3. Step 3: Cross multiply
    308.50x = 462.90 × 146.18
  4. Step 4: Simplify right side
    308.50x = 67,666.72
  5. Step 5: Solve for x
    x = 67,666.72/308.50
  6. Step 6: Final answer
    x = 219.34

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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.