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Finding the Fourth Proportional to 538.96, 809.14 and 517

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Solution

The fourth proportional to 538.96, 809.14 and 517 is: 776.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.96 : 809.14 = 517 : x
  2. Step 2: Convert to fraction form
    538.96/809.14 = 517/x
  3. Step 3: Cross multiply
    538.96x = 809.14 × 517
  4. Step 4: Simplify right side
    538.96x = 418,325.38
  5. Step 5: Solve for x
    x = 418,325.38/538.96
  6. Step 6: Final answer
    x = 776.17

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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.