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Finding the Fourth Proportional to 516.62, 712.98 and 320.18

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Solution

The fourth proportional to 516.62, 712.98 and 320.18 is: 441.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.62 : 712.98 = 320.18 : x
  2. Step 2: Convert to fraction form
    516.62/712.98 = 320.18/x
  3. Step 3: Cross multiply
    516.62x = 712.98 × 320.18
  4. Step 4: Simplify right side
    516.62x = 228,281.94
  5. Step 5: Solve for x
    x = 228,281.94/516.62
  6. Step 6: Final answer
    x = 441.88

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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.