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Finding the Fourth Proportional to 519.60, 778.71 and 194.64

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Solution

The fourth proportional to 519.60, 778.71 and 194.64 is: 291.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.60 : 778.71 = 194.64 : x
  2. Step 2: Convert to fraction form
    519.60/778.71 = 194.64/x
  3. Step 3: Cross multiply
    519.60x = 778.71 × 194.64
  4. Step 4: Simplify right side
    519.60x = 151,568.11
  5. Step 5: Solve for x
    x = 151,568.11/519.60
  6. Step 6: Final answer
    x = 291.70

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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.