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Finding the Fourth Proportional to 1,334.88, 1,991.43 and 1,272.96

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Solution

The fourth proportional to 1,334.88, 1,991.43 and 1,272.96 is: 1,899.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,334.88 : 1,991.43 = 1,272.96 : x
  2. Step 2: Convert to fraction form
    1,334.88/1,991.43 = 1,272.96/x
  3. Step 3: Cross multiply
    1,334.88x = 1,991.43 × 1,272.96
  4. Step 4: Simplify right side
    1,334.88x = 2,535,010.73
  5. Step 5: Solve for x
    x = 2,535,010.73/1,334.88
  6. Step 6: Final answer
    x = 1,899.06

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.