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Finding the Fourth Proportional to 3,381.50, 5,072.26 and 1,329.50

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Solution

The fourth proportional to 3,381.50, 5,072.26 and 1,329.50 is: 1,994.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,381.50 : 5,072.26 = 1,329.50 : x
  2. Step 2: Convert to fraction form
    3,381.50/5,072.26 = 1,329.50/x
  3. Step 3: Cross multiply
    3,381.50x = 5,072.26 × 1,329.50
  4. Step 4: Simplify right side
    3,381.50x = 6,743,569.67
  5. Step 5: Solve for x
    x = 6,743,569.67/3,381.50
  6. Step 6: Final answer
    x = 1,994.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.