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Finding the Fourth Proportional to 520.12, 717.91 and 323.79

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Solution

The fourth proportional to 520.12, 717.91 and 323.79 is: 446.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.12 : 717.91 = 323.79 : x
  2. Step 2: Convert to fraction form
    520.12/717.91 = 323.79/x
  3. Step 3: Cross multiply
    520.12x = 717.91 × 323.79
  4. Step 4: Simplify right side
    520.12x = 232,452.08
  5. Step 5: Solve for x
    x = 232,452.08/520.12
  6. Step 6: Final answer
    x = 446.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.