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Finding the Fourth Proportional to 265.97, 398.55 and 188.66

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Solution

The fourth proportional to 265.97, 398.55 and 188.66 is: 282.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.97 : 398.55 = 188.66 : x
  2. Step 2: Convert to fraction form
    265.97/398.55 = 188.66/x
  3. Step 3: Cross multiply
    265.97x = 398.55 × 188.66
  4. Step 4: Simplify right side
    265.97x = 75,190.44
  5. Step 5: Solve for x
    x = 75,190.44/265.97
  6. Step 6: Final answer
    x = 282.70

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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.