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Finding the Fourth Proportional to 473.22, 709.36 and 318.79

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Solution

The fourth proportional to 473.22, 709.36 and 318.79 is: 477.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.22 : 709.36 = 318.79 : x
  2. Step 2: Convert to fraction form
    473.22/709.36 = 318.79/x
  3. Step 3: Cross multiply
    473.22x = 709.36 × 318.79
  4. Step 4: Simplify right side
    473.22x = 226,136.87
  5. Step 5: Solve for x
    x = 226,136.87/473.22
  6. Step 6: Final answer
    x = 477.87

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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.