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Finding the Fourth Proportional to 518.85, 716.04 and 285.99

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Solution

The fourth proportional to 518.85, 716.04 and 285.99 is: 394.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.85 : 716.04 = 285.99 : x
  2. Step 2: Convert to fraction form
    518.85/716.04 = 285.99/x
  3. Step 3: Cross multiply
    518.85x = 716.04 × 285.99
  4. Step 4: Simplify right side
    518.85x = 204,780.28
  5. Step 5: Solve for x
    x = 204,780.28/518.85
  6. Step 6: Final answer
    x = 394.68

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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.