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Finding the Fourth Proportional to 275.13, 412.69 and 82.75

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Solution

The fourth proportional to 275.13, 412.69 and 82.75 is: 124.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.13 : 412.69 = 82.75 : x
  2. Step 2: Convert to fraction form
    275.13/412.69 = 82.75/x
  3. Step 3: Cross multiply
    275.13x = 412.69 × 82.75
  4. Step 4: Simplify right side
    275.13x = 34,150.10
  5. Step 5: Solve for x
    x = 34,150.10/275.13
  6. Step 6: Final answer
    x = 124.12

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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.