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Finding the Fourth Proportional to 294.64, 405.81 and 255.15

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Solution

The fourth proportional to 294.64, 405.81 and 255.15 is: 351.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.64 : 405.81 = 255.15 : x
  2. Step 2: Convert to fraction form
    294.64/405.81 = 255.15/x
  3. Step 3: Cross multiply
    294.64x = 405.81 × 255.15
  4. Step 4: Simplify right side
    294.64x = 103,542.42
  5. Step 5: Solve for x
    x = 103,542.42/294.64
  6. Step 6: Final answer
    x = 351.42

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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.