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Finding the Fourth Proportional to 472.11, 708.36 and 255.43

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Solution

The fourth proportional to 472.11, 708.36 and 255.43 is: 383.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.11 : 708.36 = 255.43 : x
  2. Step 2: Convert to fraction form
    472.11/708.36 = 255.43/x
  3. Step 3: Cross multiply
    472.11x = 708.36 × 255.43
  4. Step 4: Simplify right side
    472.11x = 180,936.39
  5. Step 5: Solve for x
    x = 180,936.39/472.11
  6. Step 6: Final answer
    x = 383.25

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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.