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Finding the Fourth Proportional to 516.74, 713.23 and 317.63

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Solution

The fourth proportional to 516.74, 713.23 and 317.63 is: 438.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.74 : 713.23 = 317.63 : x
  2. Step 2: Convert to fraction form
    516.74/713.23 = 317.63/x
  3. Step 3: Cross multiply
    516.74x = 713.23 × 317.63
  4. Step 4: Simplify right side
    516.74x = 226,544.23
  5. Step 5: Solve for x
    x = 226,544.23/516.74
  6. Step 6: Final answer
    x = 438.41

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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.