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Finding the Fourth Proportional to 317.57, 438.12 and 201.17

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Solution

The fourth proportional to 317.57, 438.12 and 201.17 is: 277.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.57 : 438.12 = 201.17 : x
  2. Step 2: Convert to fraction form
    317.57/438.12 = 201.17/x
  3. Step 3: Cross multiply
    317.57x = 438.12 × 201.17
  4. Step 4: Simplify right side
    317.57x = 88,136.60
  5. Step 5: Solve for x
    x = 88,136.60/317.57
  6. Step 6: Final answer
    x = 277.53

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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.