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Finding the Fourth Proportional to 519.36, 780.46 and 516.52

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Solution

The fourth proportional to 519.36, 780.46 and 516.52 is: 776.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.36 : 780.46 = 516.52 : x
  2. Step 2: Convert to fraction form
    519.36/780.46 = 516.52/x
  3. Step 3: Cross multiply
    519.36x = 780.46 × 516.52
  4. Step 4: Simplify right side
    519.36x = 403,123.20
  5. Step 5: Solve for x
    x = 403,123.20/519.36
  6. Step 6: Final answer
    x = 776.19

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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.