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Finding the Fourth Proportional to 265.93, 398.79 and 111.78

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Solution

The fourth proportional to 265.93, 398.79 and 111.78 is: 167.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.93 : 398.79 = 111.78 : x
  2. Step 2: Convert to fraction form
    265.93/398.79 = 111.78/x
  3. Step 3: Cross multiply
    265.93x = 398.79 × 111.78
  4. Step 4: Simplify right side
    265.93x = 44,576.75
  5. Step 5: Solve for x
    x = 44,576.75/265.93
  6. Step 6: Final answer
    x = 167.63

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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.