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Finding the Fourth Proportional to 516.68, 713.38 and 320.28

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Solution

The fourth proportional to 516.68, 713.38 and 320.28 is: 442.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.68 : 713.38 = 320.28 : x
  2. Step 2: Convert to fraction form
    516.68/713.38 = 320.28/x
  3. Step 3: Cross multiply
    516.68x = 713.38 × 320.28
  4. Step 4: Simplify right side
    516.68x = 228,481.35
  5. Step 5: Solve for x
    x = 228,481.35/516.68
  6. Step 6: Final answer
    x = 442.21

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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.