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Finding the Fourth Proportional to 519.26, 716.56 and 286.38

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Solution

The fourth proportional to 519.26, 716.56 and 286.38 is: 395.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.26 : 716.56 = 286.38 : x
  2. Step 2: Convert to fraction form
    519.26/716.56 = 286.38/x
  3. Step 3: Cross multiply
    519.26x = 716.56 × 286.38
  4. Step 4: Simplify right side
    519.26x = 205,208.45
  5. Step 5: Solve for x
    x = 205,208.45/519.26
  6. Step 6: Final answer
    x = 395.19

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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.