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Finding the Fourth Proportional to 308.91, 463.15 and 123.69

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Solution

The fourth proportional to 308.91, 463.15 and 123.69 is: 185.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.91 : 463.15 = 123.69 : x
  2. Step 2: Convert to fraction form
    308.91/463.15 = 123.69/x
  3. Step 3: Cross multiply
    308.91x = 463.15 × 123.69
  4. Step 4: Simplify right side
    308.91x = 57,287.02
  5. Step 5: Solve for x
    x = 57,287.02/308.91
  6. Step 6: Final answer
    x = 185.45

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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.