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Finding the Fourth Proportional to 265.47, 397.86 and 111.22

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Solution

The fourth proportional to 265.47, 397.86 and 111.22 is: 166.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.47 : 397.86 = 111.22 : x
  2. Step 2: Convert to fraction form
    265.47/397.86 = 111.22/x
  3. Step 3: Cross multiply
    265.47x = 397.86 × 111.22
  4. Step 4: Simplify right side
    265.47x = 44,247.44
  5. Step 5: Solve for x
    x = 44,247.44/265.47
  6. Step 6: Final answer
    x = 166.68

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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.