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Finding the Fourth Proportional to 308.78, 463.35 and 164.50

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Solution

The fourth proportional to 308.78, 463.35 and 164.50 is: 246.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.78 : 463.35 = 164.50 : x
  2. Step 2: Convert to fraction form
    308.78/463.35 = 164.50/x
  3. Step 3: Cross multiply
    308.78x = 463.35 × 164.50
  4. Step 4: Simplify right side
    308.78x = 76,221.08
  5. Step 5: Solve for x
    x = 76,221.08/308.78
  6. Step 6: Final answer
    x = 246.85

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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.