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Finding the Fourth Proportional to 474.93, 712.82 and 255.73

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Solution

The fourth proportional to 474.93, 712.82 and 255.73 is: 383.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.93 : 712.82 = 255.73 : x
  2. Step 2: Convert to fraction form
    474.93/712.82 = 255.73/x
  3. Step 3: Cross multiply
    474.93x = 712.82 × 255.73
  4. Step 4: Simplify right side
    474.93x = 182,289.46
  5. Step 5: Solve for x
    x = 182,289.46/474.93
  6. Step 6: Final answer
    x = 383.82

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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.