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Finding the Fourth Proportional to 617.11, 926.21 and 520.99

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Solution

The fourth proportional to 617.11, 926.21 and 520.99 is: 781.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.11 : 926.21 = 520.99 : x
  2. Step 2: Convert to fraction form
    617.11/926.21 = 520.99/x
  3. Step 3: Cross multiply
    617.11x = 926.21 × 520.99
  4. Step 4: Simplify right side
    617.11x = 482,543.54
  5. Step 5: Solve for x
    x = 482,543.54/617.11
  6. Step 6: Final answer
    x = 781.94

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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.