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Finding the Fourth Proportional to 265.11, 397.18 and 127.81

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Solution

The fourth proportional to 265.11, 397.18 and 127.81 is: 191.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.11 : 397.18 = 127.81 : x
  2. Step 2: Convert to fraction form
    265.11/397.18 = 127.81/x
  3. Step 3: Cross multiply
    265.11x = 397.18 × 127.81
  4. Step 4: Simplify right side
    265.11x = 50,763.58
  5. Step 5: Solve for x
    x = 50,763.58/265.11
  6. Step 6: Final answer
    x = 191.48

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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.