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Finding the Fourth Proportional to 519.71, 779.85 and 195.30

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Solution

The fourth proportional to 519.71, 779.85 and 195.30 is: 293.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.71 : 779.85 = 195.30 : x
  2. Step 2: Convert to fraction form
    519.71/779.85 = 195.30/x
  3. Step 3: Cross multiply
    519.71x = 779.85 × 195.30
  4. Step 4: Simplify right side
    519.71x = 152,304.71
  5. Step 5: Solve for x
    x = 152,304.71/519.71
  6. Step 6: Final answer
    x = 293.06

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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.