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Finding the Fourth Proportional to 308.74, 463.12 and 103.30

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Solution

The fourth proportional to 308.74, 463.12 and 103.30 is: 154.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.74 : 463.12 = 103.30 : x
  2. Step 2: Convert to fraction form
    308.74/463.12 = 103.30/x
  3. Step 3: Cross multiply
    308.74x = 463.12 × 103.30
  4. Step 4: Simplify right side
    308.74x = 47,840.30
  5. Step 5: Solve for x
    x = 47,840.30/308.74
  6. Step 6: Final answer
    x = 154.95

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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.