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Finding the Fourth Proportional to 265.31, 366 and 198.81

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Solution

The fourth proportional to 265.31, 366 and 198.81 is: 274.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.31 : 366 = 198.81 : x
  2. Step 2: Convert to fraction form
    265.31/366 = 198.81/x
  3. Step 3: Cross multiply
    265.31x = 366 × 198.81
  4. Step 4: Simplify right side
    265.31x = 72,764.46
  5. Step 5: Solve for x
    x = 72,764.46/265.31
  6. Step 6: Final answer
    x = 274.26

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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.