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Finding the Fourth Proportional to 516.23, 712.57 and 309.23

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Solution

The fourth proportional to 516.23, 712.57 and 309.23 is: 426.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.23 : 712.57 = 309.23 : x
  2. Step 2: Convert to fraction form
    516.23/712.57 = 309.23/x
  3. Step 3: Cross multiply
    516.23x = 712.57 × 309.23
  4. Step 4: Simplify right side
    516.23x = 220,344.46
  5. Step 5: Solve for x
    x = 220,344.46/516.23
  6. Step 6: Final answer
    x = 426.84

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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.