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Finding the Fourth Proportional to 265.64, 398.18 and 121.46

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Solution

The fourth proportional to 265.64, 398.18 and 121.46 is: 182.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.64 : 398.18 = 121.46 : x
  2. Step 2: Convert to fraction form
    265.64/398.18 = 121.46/x
  3. Step 3: Cross multiply
    265.64x = 398.18 × 121.46
  4. Step 4: Simplify right side
    265.64x = 48,361.26
  5. Step 5: Solve for x
    x = 48,361.26/265.64
  6. Step 6: Final answer
    x = 182.06

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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.