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Finding the Fourth Proportional to 275.28, 410.90 and 255.25

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Solution

The fourth proportional to 275.28, 410.90 and 255.25 is: 381.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.28 : 410.90 = 255.25 : x
  2. Step 2: Convert to fraction form
    275.28/410.90 = 255.25/x
  3. Step 3: Cross multiply
    275.28x = 410.90 × 255.25
  4. Step 4: Simplify right side
    275.28x = 104,882.23
  5. Step 5: Solve for x
    x = 104,882.23/275.28
  6. Step 6: Final answer
    x = 381.00

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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.