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Finding the Fourth Proportional to 516.80, 713.11 and 295.72

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Solution

The fourth proportional to 516.80, 713.11 and 295.72 is: 408.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.80 : 713.11 = 295.72 : x
  2. Step 2: Convert to fraction form
    516.80/713.11 = 295.72/x
  3. Step 3: Cross multiply
    516.80x = 713.11 × 295.72
  4. Step 4: Simplify right side
    516.80x = 210,880.89
  5. Step 5: Solve for x
    x = 210,880.89/516.80
  6. Step 6: Final answer
    x = 408.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.