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Finding the Fourth Proportional to 518.94, 778.59 and 194.36

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Solution

The fourth proportional to 518.94, 778.59 and 194.36 is: 291.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.94 : 778.59 = 194.36 : x
  2. Step 2: Convert to fraction form
    518.94/778.59 = 194.36/x
  3. Step 3: Cross multiply
    518.94x = 778.59 × 194.36
  4. Step 4: Simplify right side
    518.94x = 151,322.86
  5. Step 5: Solve for x
    x = 151,322.86/518.94
  6. Step 6: Final answer
    x = 291.60

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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.