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Finding the Fourth Proportional to 308.91, 463.29 and 89.49

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Solution

The fourth proportional to 308.91, 463.29 and 89.49 is: 134.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.91 : 463.29 = 89.49 : x
  2. Step 2: Convert to fraction form
    308.91/463.29 = 89.49/x
  3. Step 3: Cross multiply
    308.91x = 463.29 × 89.49
  4. Step 4: Simplify right side
    308.91x = 41,459.82
  5. Step 5: Solve for x
    x = 41,459.82/308.91
  6. Step 6: Final answer
    x = 134.21

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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.