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Finding the Fourth Proportional to 518.76, 773.39 and 479.88

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Solution

The fourth proportional to 518.76, 773.39 and 479.88 is: 715.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.76 : 773.39 = 479.88 : x
  2. Step 2: Convert to fraction form
    518.76/773.39 = 479.88/x
  3. Step 3: Cross multiply
    518.76x = 773.39 × 479.88
  4. Step 4: Simplify right side
    518.76x = 371,135.59
  5. Step 5: Solve for x
    x = 371,135.59/518.76
  6. Step 6: Final answer
    x = 715.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.