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Finding the Fourth Proportional to 314.31, 433.26 and 255.99

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Solution

The fourth proportional to 314.31, 433.26 and 255.99 is: 352.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.31 : 433.26 = 255.99 : x
  2. Step 2: Convert to fraction form
    314.31/433.26 = 255.99/x
  3. Step 3: Cross multiply
    314.31x = 433.26 × 255.99
  4. Step 4: Simplify right side
    314.31x = 110,910.23
  5. Step 5: Solve for x
    x = 110,910.23/314.31
  6. Step 6: Final answer
    x = 352.87

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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.