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Finding the Fourth Proportional to 265.20, 365.22 and 191.40

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Solution

The fourth proportional to 265.20, 365.22 and 191.40 is: 263.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.20 : 365.22 = 191.40 : x
  2. Step 2: Convert to fraction form
    265.20/365.22 = 191.40/x
  3. Step 3: Cross multiply
    265.20x = 365.22 × 191.40
  4. Step 4: Simplify right side
    265.20x = 69,903.11
  5. Step 5: Solve for x
    x = 69,903.11/265.20
  6. Step 6: Final answer
    x = 263.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.