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Finding the Fourth Proportional to 275.27, 412.49 and 255.02

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Solution

The fourth proportional to 275.27, 412.49 and 255.02 is: 382.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.27 : 412.49 = 255.02 : x
  2. Step 2: Convert to fraction form
    275.27/412.49 = 255.02/x
  3. Step 3: Cross multiply
    275.27x = 412.49 × 255.02
  4. Step 4: Simplify right side
    275.27x = 105,191.77
  5. Step 5: Solve for x
    x = 105,191.77/275.27
  6. Step 6: Final answer
    x = 382.15

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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.