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Finding the Fourth Proportional to 472.73, 709.33 and 212.92

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Solution

The fourth proportional to 472.73, 709.33 and 212.92 is: 319.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.73 : 709.33 = 212.92 : x
  2. Step 2: Convert to fraction form
    472.73/709.33 = 212.92/x
  3. Step 3: Cross multiply
    472.73x = 709.33 × 212.92
  4. Step 4: Simplify right side
    472.73x = 151,025.93
  5. Step 5: Solve for x
    x = 151,025.93/472.73
  6. Step 6: Final answer
    x = 319.48

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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.