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Finding the Fourth Proportional to 473.91, 711.09 and 213.98

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Solution

The fourth proportional to 473.91, 711.09 and 213.98 is: 321.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.91 : 711.09 = 213.98 : x
  2. Step 2: Convert to fraction form
    473.91/711.09 = 213.98/x
  3. Step 3: Cross multiply
    473.91x = 711.09 × 213.98
  4. Step 4: Simplify right side
    473.91x = 152,157.97
  5. Step 5: Solve for x
    x = 152,157.97/473.91
  6. Step 6: Final answer
    x = 321.07

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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.