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Finding the Fourth Proportional to 519.51, 716.85 and 298.44

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Solution

The fourth proportional to 519.51, 716.85 and 298.44 is: 411.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.51 : 716.85 = 298.44 : x
  2. Step 2: Convert to fraction form
    519.51/716.85 = 298.44/x
  3. Step 3: Cross multiply
    519.51x = 716.85 × 298.44
  4. Step 4: Simplify right side
    519.51x = 213,936.71
  5. Step 5: Solve for x
    x = 213,936.71/519.51
  6. Step 6: Final answer
    x = 411.80

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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.