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Finding the Fourth Proportional to 317.62, 438.27 and 193.29

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Solution

The fourth proportional to 317.62, 438.27 and 193.29 is: 266.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.62 : 438.27 = 193.29 : x
  2. Step 2: Convert to fraction form
    317.62/438.27 = 193.29/x
  3. Step 3: Cross multiply
    317.62x = 438.27 × 193.29
  4. Step 4: Simplify right side
    317.62x = 84,711.02
  5. Step 5: Solve for x
    x = 84,711.02/317.62
  6. Step 6: Final answer
    x = 266.71

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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.