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Finding the Fourth Proportional to 520.23, 717.91 and 299.19

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Solution

The fourth proportional to 520.23, 717.91 and 299.19 is: 412.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.23 : 717.91 = 299.19 : x
  2. Step 2: Convert to fraction form
    520.23/717.91 = 299.19/x
  3. Step 3: Cross multiply
    520.23x = 717.91 × 299.19
  4. Step 4: Simplify right side
    520.23x = 214,791.49
  5. Step 5: Solve for x
    x = 214,791.49/520.23
  6. Step 6: Final answer
    x = 412.88

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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.