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Finding the Fourth Proportional to 516.44, 712.63 and 306.58

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Solution

The fourth proportional to 516.44, 712.63 and 306.58 is: 423.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.44 : 712.63 = 306.58 : x
  2. Step 2: Convert to fraction form
    516.44/712.63 = 306.58/x
  3. Step 3: Cross multiply
    516.44x = 712.63 × 306.58
  4. Step 4: Simplify right side
    516.44x = 218,478.11
  5. Step 5: Solve for x
    x = 218,478.11/516.44
  6. Step 6: Final answer
    x = 423.05

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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.