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Finding the Fourth Proportional to 518.91, 716.12 and 286.05

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Solution

The fourth proportional to 518.91, 716.12 and 286.05 is: 394.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.91 : 716.12 = 286.05 : x
  2. Step 2: Convert to fraction form
    518.91/716.12 = 286.05/x
  3. Step 3: Cross multiply
    518.91x = 716.12 × 286.05
  4. Step 4: Simplify right side
    518.91x = 204,844.70
  5. Step 5: Solve for x
    x = 204,844.70/518.91
  6. Step 6: Final answer
    x = 394.76

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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.