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Finding the Fourth Proportional to 317.88, 439.25 and 248.12

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Solution

The fourth proportional to 317.88, 439.25 and 248.12 is: 342.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.88 : 439.25 = 248.12 : x
  2. Step 2: Convert to fraction form
    317.88/439.25 = 248.12/x
  3. Step 3: Cross multiply
    317.88x = 439.25 × 248.12
  4. Step 4: Simplify right side
    317.88x = 108,983.27
  5. Step 5: Solve for x
    x = 108,983.27/317.88
  6. Step 6: Final answer
    x = 342.84

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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.