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Finding the Fourth Proportional to 275.18, 410.81 and 265.56

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Solution

The fourth proportional to 275.18, 410.81 and 265.56 is: 396.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.18 : 410.81 = 265.56 : x
  2. Step 2: Convert to fraction form
    275.18/410.81 = 265.56/x
  3. Step 3: Cross multiply
    275.18x = 410.81 × 265.56
  4. Step 4: Simplify right side
    275.18x = 109,093.38
  5. Step 5: Solve for x
    x = 109,093.38/275.18
  6. Step 6: Final answer
    x = 396.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.