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Finding the Fourth Proportional to 519.34, 779.28 and 288.43

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Solution

The fourth proportional to 519.34, 779.28 and 288.43 is: 432.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.34 : 779.28 = 288.43 : x
  2. Step 2: Convert to fraction form
    519.34/779.28 = 288.43/x
  3. Step 3: Cross multiply
    519.34x = 779.28 × 288.43
  4. Step 4: Simplify right side
    519.34x = 224,767.73
  5. Step 5: Solve for x
    x = 224,767.73/519.34
  6. Step 6: Final answer
    x = 432.79

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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.