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Finding the Fourth Proportional to 523.31, 786.38 and 317.97

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Solution

The fourth proportional to 523.31, 786.38 and 317.97 is: 477.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.31 : 786.38 = 317.97 : x
  2. Step 2: Convert to fraction form
    523.31/786.38 = 317.97/x
  3. Step 3: Cross multiply
    523.31x = 786.38 × 317.97
  4. Step 4: Simplify right side
    523.31x = 250,043.66
  5. Step 5: Solve for x
    x = 250,043.66/523.31
  6. Step 6: Final answer
    x = 477.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.