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Finding the Fourth Proportional to 317.29, 438.27 and 243.48

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Solution

The fourth proportional to 317.29, 438.27 and 243.48 is: 336.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.29 : 438.27 = 243.48 : x
  2. Step 2: Convert to fraction form
    317.29/438.27 = 243.48/x
  3. Step 3: Cross multiply
    317.29x = 438.27 × 243.48
  4. Step 4: Simplify right side
    317.29x = 106,709.25
  5. Step 5: Solve for x
    x = 106,709.25/317.29
  6. Step 6: Final answer
    x = 336.32

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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.