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Finding the Fourth Proportional to 516.88, 775.60 and 515.36

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Solution

The fourth proportional to 516.88, 775.60 and 515.36 is: 773.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.88 : 775.60 = 515.36 : x
  2. Step 2: Convert to fraction form
    516.88/775.60 = 515.36/x
  3. Step 3: Cross multiply
    516.88x = 775.60 × 515.36
  4. Step 4: Simplify right side
    516.88x = 399,713.22
  5. Step 5: Solve for x
    x = 399,713.22/516.88
  6. Step 6: Final answer
    x = 773.32

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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.