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Finding the Fourth Proportional to 265.11, 397.65 and 111.03

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Solution

The fourth proportional to 265.11, 397.65 and 111.03 is: 166.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.11 : 397.65 = 111.03 : x
  2. Step 2: Convert to fraction form
    265.11/397.65 = 111.03/x
  3. Step 3: Cross multiply
    265.11x = 397.65 × 111.03
  4. Step 4: Simplify right side
    265.11x = 44,151.08
  5. Step 5: Solve for x
    x = 44,151.08/265.11
  6. Step 6: Final answer
    x = 166.54

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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.