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Finding the Fourth Proportional to 308.23, 461.64 and 253.57

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Solution

The fourth proportional to 308.23, 461.64 and 253.57 is: 379.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.23 : 461.64 = 253.57 : x
  2. Step 2: Convert to fraction form
    308.23/461.64 = 253.57/x
  3. Step 3: Cross multiply
    308.23x = 461.64 × 253.57
  4. Step 4: Simplify right side
    308.23x = 117,058.05
  5. Step 5: Solve for x
    x = 117,058.05/308.23
  6. Step 6: Final answer
    x = 379.78

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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.