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Finding the Fourth Proportional to 686.04, 945.94 and 519.92

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Solution

The fourth proportional to 686.04, 945.94 and 519.92 is: 716.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    686.04 : 945.94 = 519.92 : x
  2. Step 2: Convert to fraction form
    686.04/945.94 = 519.92/x
  3. Step 3: Cross multiply
    686.04x = 945.94 × 519.92
  4. Step 4: Simplify right side
    686.04x = 491,813.12
  5. Step 5: Solve for x
    x = 491,813.12/686.04
  6. Step 6: Final answer
    x = 716.89

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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.