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Finding the Fourth Proportional to 519.77, 779.57 and 190.68

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Solution

The fourth proportional to 519.77, 779.57 and 190.68 is: 285.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.77 : 779.57 = 190.68 : x
  2. Step 2: Convert to fraction form
    519.77/779.57 = 190.68/x
  3. Step 3: Cross multiply
    519.77x = 779.57 × 190.68
  4. Step 4: Simplify right side
    519.77x = 148,648.41
  5. Step 5: Solve for x
    x = 148,648.41/519.77
  6. Step 6: Final answer
    x = 285.99

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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.