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Finding the Fourth Proportional to 317.44, 438.20 and 268.57

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Solution

The fourth proportional to 317.44, 438.20 and 268.57 is: 370.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.44 : 438.20 = 268.57 : x
  2. Step 2: Convert to fraction form
    317.44/438.20 = 268.57/x
  3. Step 3: Cross multiply
    317.44x = 438.20 × 268.57
  4. Step 4: Simplify right side
    317.44x = 117,687.37
  5. Step 5: Solve for x
    x = 117,687.37/317.44
  6. Step 6: Final answer
    x = 370.74

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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.