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Finding the Fourth Proportional to 519.92, 718.44 and 494.61

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Solution

The fourth proportional to 519.92, 718.44 and 494.61 is: 683.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.92 : 718.44 = 494.61 : x
  2. Step 2: Convert to fraction form
    519.92/718.44 = 494.61/x
  3. Step 3: Cross multiply
    519.92x = 718.44 × 494.61
  4. Step 4: Simplify right side
    519.92x = 355,347.61
  5. Step 5: Solve for x
    x = 355,347.61/519.92
  6. Step 6: Final answer
    x = 683.47

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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.