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Finding the Fourth Proportional to 308.36, 424.89 and 229.52

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Solution

The fourth proportional to 308.36, 424.89 and 229.52 is: 316.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.36 : 424.89 = 229.52 : x
  2. Step 2: Convert to fraction form
    308.36/424.89 = 229.52/x
  3. Step 3: Cross multiply
    308.36x = 424.89 × 229.52
  4. Step 4: Simplify right side
    308.36x = 97,518.63
  5. Step 5: Solve for x
    x = 97,518.63/308.36
  6. Step 6: Final answer
    x = 316.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.