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Finding the Fourth Proportional to 519.02, 716.28 and 286.15

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Solution

The fourth proportional to 519.02, 716.28 and 286.15 is: 394.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.02 : 716.28 = 286.15 : x
  2. Step 2: Convert to fraction form
    519.02/716.28 = 286.15/x
  3. Step 3: Cross multiply
    519.02x = 716.28 × 286.15
  4. Step 4: Simplify right side
    519.02x = 204,959.94
  5. Step 5: Solve for x
    x = 204,959.94/519.02
  6. Step 6: Final answer
    x = 394.90

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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.