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Finding the Fourth Proportional to 518.97, 778.45 and 356.16

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Solution

The fourth proportional to 518.97, 778.45 and 356.16 is: 534.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.97 : 778.45 = 356.16 : x
  2. Step 2: Convert to fraction form
    518.97/778.45 = 356.16/x
  3. Step 3: Cross multiply
    518.97x = 778.45 × 356.16
  4. Step 4: Simplify right side
    518.97x = 277,252.75
  5. Step 5: Solve for x
    x = 277,252.75/518.97
  6. Step 6: Final answer
    x = 534.24

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Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.