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Finding the Fourth Proportional to 516.83, 713.21 and 307.04

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Solution

The fourth proportional to 516.83, 713.21 and 307.04 is: 423.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.83 : 713.21 = 307.04 : x
  2. Step 2: Convert to fraction form
    516.83/713.21 = 307.04/x
  3. Step 3: Cross multiply
    516.83x = 713.21 × 307.04
  4. Step 4: Simplify right side
    516.83x = 218,978.90
  5. Step 5: Solve for x
    x = 218,978.90/516.83
  6. Step 6: Final answer
    x = 423.70

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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.