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Finding the Fourth Proportional to 317.73, 438.15 and 239.24

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Solution

The fourth proportional to 317.73, 438.15 and 239.24 is: 329.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.73 : 438.15 = 239.24 : x
  2. Step 2: Convert to fraction form
    317.73/438.15 = 239.24/x
  3. Step 3: Cross multiply
    317.73x = 438.15 × 239.24
  4. Step 4: Simplify right side
    317.73x = 104,820.82
  5. Step 5: Solve for x
    x = 104,820.82/317.73
  6. Step 6: Final answer
    x = 329.91

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.