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Finding the Fourth Proportional to 476.43, 713.91 and 321.81

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Solution

The fourth proportional to 476.43, 713.91 and 321.81 is: 482.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    476.43 : 713.91 = 321.81 : x
  2. Step 2: Convert to fraction form
    476.43/713.91 = 321.81/x
  3. Step 3: Cross multiply
    476.43x = 713.91 × 321.81
  4. Step 4: Simplify right side
    476.43x = 229,743.38
  5. Step 5: Solve for x
    x = 229,743.38/476.43
  6. Step 6: Final answer
    x = 482.22

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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.