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Finding the Fourth Proportional to 308.05, 424.66 and 220.57

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Solution

The fourth proportional to 308.05, 424.66 and 220.57 is: 304.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.05 : 424.66 = 220.57 : x
  2. Step 2: Convert to fraction form
    308.05/424.66 = 220.57/x
  3. Step 3: Cross multiply
    308.05x = 424.66 × 220.57
  4. Step 4: Simplify right side
    308.05x = 93,667.26
  5. Step 5: Solve for x
    x = 93,667.26/308.05
  6. Step 6: Final answer
    x = 304.07

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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.