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Finding the Fourth Proportional to 265.15, 365.80 and 191.30

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Solution

The fourth proportional to 265.15, 365.80 and 191.30 is: 263.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.15 : 365.80 = 191.30 : x
  2. Step 2: Convert to fraction form
    265.15/365.80 = 191.30/x
  3. Step 3: Cross multiply
    265.15x = 365.80 × 191.30
  4. Step 4: Simplify right side
    265.15x = 69,977.50
  5. Step 5: Solve for x
    x = 69,977.50/265.15
  6. Step 6: Final answer
    x = 263.92

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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.