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Finding the Fourth Proportional to 308.63, 425.90 and 192.19

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Solution

The fourth proportional to 308.63, 425.90 and 192.19 is: 265.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.63 : 425.90 = 192.19 : x
  2. Step 2: Convert to fraction form
    308.63/425.90 = 192.19/x
  3. Step 3: Cross multiply
    308.63x = 425.90 × 192.19
  4. Step 4: Simplify right side
    308.63x = 81,853.14
  5. Step 5: Solve for x
    x = 81,853.14/308.63
  6. Step 6: Final answer
    x = 265.22

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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.