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Finding the Fourth Proportional to 275.09, 378.81 and 240.08

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Solution

The fourth proportional to 275.09, 378.81 and 240.08 is: 330.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.09 : 378.81 = 240.08 : x
  2. Step 2: Convert to fraction form
    275.09/378.81 = 240.08/x
  3. Step 3: Cross multiply
    275.09x = 378.81 × 240.08
  4. Step 4: Simplify right side
    275.09x = 90,944.70
  5. Step 5: Solve for x
    x = 90,944.70/275.09
  6. Step 6: Final answer
    x = 330.60

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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.