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Finding the Fourth Proportional to 516.72, 712.44 and 361.52

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Solution

The fourth proportional to 516.72, 712.44 and 361.52 is: 498.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.72 : 712.44 = 361.52 : x
  2. Step 2: Convert to fraction form
    516.72/712.44 = 361.52/x
  3. Step 3: Cross multiply
    516.72x = 712.44 × 361.52
  4. Step 4: Simplify right side
    516.72x = 257,561.31
  5. Step 5: Solve for x
    x = 257,561.31/516.72
  6. Step 6: Final answer
    x = 498.45

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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.