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Finding the Fourth Proportional to 516.33, 712.47 and 392.01

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Solution

The fourth proportional to 516.33, 712.47 and 392.01 is: 540.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.33 : 712.47 = 392.01 : x
  2. Step 2: Convert to fraction form
    516.33/712.47 = 392.01/x
  3. Step 3: Cross multiply
    516.33x = 712.47 × 392.01
  4. Step 4: Simplify right side
    516.33x = 279,295.36
  5. Step 5: Solve for x
    x = 279,295.36/516.33
  6. Step 6: Final answer
    x = 540.92

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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.