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Finding the Fourth Proportional to 519.67, 779.64 and 231.04

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Solution

The fourth proportional to 519.67, 779.64 and 231.04 is: 346.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.67 : 779.64 = 231.04 : x
  2. Step 2: Convert to fraction form
    519.67/779.64 = 231.04/x
  3. Step 3: Cross multiply
    519.67x = 779.64 × 231.04
  4. Step 4: Simplify right side
    519.67x = 180,128.03
  5. Step 5: Solve for x
    x = 180,128.03/519.67
  6. Step 6: Final answer
    x = 346.62

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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.