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Finding the Fourth Proportional to 1,372.60, 1,906.99 and 1,356.22

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Solution

The fourth proportional to 1,372.60, 1,906.99 and 1,356.22 is: 1,884.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.60 : 1,906.99 = 1,356.22 : x
  2. Step 2: Convert to fraction form
    1,372.60/1,906.99 = 1,356.22/x
  3. Step 3: Cross multiply
    1,372.60x = 1,906.99 × 1,356.22
  4. Step 4: Simplify right side
    1,372.60x = 2,586,297.98
  5. Step 5: Solve for x
    x = 2,586,297.98/1,372.60
  6. Step 6: Final answer
    x = 1,884.23

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.