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Finding the Fourth Proportional to 308.92, 463.40 and 92.50

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Solution

The fourth proportional to 308.92, 463.40 and 92.50 is: 138.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.92 : 463.40 = 92.50 : x
  2. Step 2: Convert to fraction form
    308.92/463.40 = 92.50/x
  3. Step 3: Cross multiply
    308.92x = 463.40 × 92.50
  4. Step 4: Simplify right side
    308.92x = 42,864.50
  5. Step 5: Solve for x
    x = 42,864.50/308.92
  6. Step 6: Final answer
    x = 138.76

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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.