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Finding the Fourth Proportional to 265.90, 398.94 and 121.59

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Solution

The fourth proportional to 265.90, 398.94 and 121.59 is: 182.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.90 : 398.94 = 121.59 : x
  2. Step 2: Convert to fraction form
    265.90/398.94 = 121.59/x
  3. Step 3: Cross multiply
    265.90x = 398.94 × 121.59
  4. Step 4: Simplify right side
    265.90x = 48,507.11
  5. Step 5: Solve for x
    x = 48,507.11/265.90
  6. Step 6: Final answer
    x = 182.43

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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.