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Finding the Fourth Proportional to 516.72, 775.44 and 300.72

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Solution

The fourth proportional to 516.72, 775.44 and 300.72 is: 451.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.72 : 775.44 = 300.72 : x
  2. Step 2: Convert to fraction form
    516.72/775.44 = 300.72/x
  3. Step 3: Cross multiply
    516.72x = 775.44 × 300.72
  4. Step 4: Simplify right side
    516.72x = 233,190.32
  5. Step 5: Solve for x
    x = 233,190.32/516.72
  6. Step 6: Final answer
    x = 451.29

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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.