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Finding the Fourth Proportional to 1,333.12, 1,999.38 and 845.48

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Solution

The fourth proportional to 1,333.12, 1,999.38 and 845.48 is: 1,268.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,333.12 : 1,999.38 = 845.48 : x
  2. Step 2: Convert to fraction form
    1,333.12/1,999.38 = 845.48/x
  3. Step 3: Cross multiply
    1,333.12x = 1,999.38 × 845.48
  4. Step 4: Simplify right side
    1,333.12x = 1,690,435.80
  5. Step 5: Solve for x
    x = 1,690,435.80/1,333.12
  6. Step 6: Final answer
    x = 1,268.03

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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.