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Finding the Fourth Proportional to 516.30, 711.90 and 329.58

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Solution

The fourth proportional to 516.30, 711.90 and 329.58 is: 454.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.30 : 711.90 = 329.58 : x
  2. Step 2: Convert to fraction form
    516.30/711.90 = 329.58/x
  3. Step 3: Cross multiply
    516.30x = 711.90 × 329.58
  4. Step 4: Simplify right side
    516.30x = 234,628.00
  5. Step 5: Solve for x
    x = 234,628.00/516.30
  6. Step 6: Final answer
    x = 454.44

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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.