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Finding the Fourth Proportional to 265.98, 399.31 and 255.00

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Solution

The fourth proportional to 265.98, 399.31 and 255.00 is: 382.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.98 : 399.31 = 255.00 : x
  2. Step 2: Convert to fraction form
    265.98/399.31 = 255.00/x
  3. Step 3: Cross multiply
    265.98x = 399.31 × 255.00
  4. Step 4: Simplify right side
    265.98x = 101,824.10
  5. Step 5: Solve for x
    x = 101,824.10/265.98
  6. Step 6: Final answer
    x = 382.82

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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.