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Finding the Fourth Proportional to 1,328.44, 1,991.67 and 625.27

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Solution

The fourth proportional to 1,328.44, 1,991.67 and 625.27 is: 937.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.44 : 1,991.67 = 625.27 : x
  2. Step 2: Convert to fraction form
    1,328.44/1,991.67 = 625.27/x
  3. Step 3: Cross multiply
    1,328.44x = 1,991.67 × 625.27
  4. Step 4: Simplify right side
    1,328.44x = 1,245,323.40
  5. Step 5: Solve for x
    x = 1,245,323.40/1,328.44
  6. Step 6: Final answer
    x = 937.43

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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.