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Finding the Fourth Proportional to 317.70, 438.33 and 193.29

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Solution

The fourth proportional to 317.70, 438.33 and 193.29 is: 266.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    317.70 : 438.33 = 193.29 : x
  2. Step 2: Convert to fraction form
    317.70/438.33 = 193.29/x
  3. Step 3: Cross multiply
    317.70x = 438.33 × 193.29
  4. Step 4: Simplify right side
    317.70x = 84,724.81
  5. Step 5: Solve for x
    x = 84,724.81/317.70
  6. Step 6: Final answer
    x = 266.68

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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.