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Finding the Fourth Proportional to 519.53, 716.96 and 286.66

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Solution

The fourth proportional to 519.53, 716.96 and 286.66 is: 395.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.53 : 716.96 = 286.66 : x
  2. Step 2: Convert to fraction form
    519.53/716.96 = 286.66/x
  3. Step 3: Cross multiply
    519.53x = 716.96 × 286.66
  4. Step 4: Simplify right side
    519.53x = 205,520.53
  5. Step 5: Solve for x
    x = 205,520.53/519.53
  6. Step 6: Final answer
    x = 395.59

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.