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Finding the Fourth Proportional to 519.42, 779.50 and 230.70

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Solution

The fourth proportional to 519.42, 779.50 and 230.70 is: 346.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.42 : 779.50 = 230.70 : x
  2. Step 2: Convert to fraction form
    519.42/779.50 = 230.70/x
  3. Step 3: Cross multiply
    519.42x = 779.50 × 230.70
  4. Step 4: Simplify right side
    519.42x = 179,830.65
  5. Step 5: Solve for x
    x = 179,830.65/519.42
  6. Step 6: Final answer
    x = 346.21

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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.