Home / 1,638.26-2,260.68-939.50

Finding the Fourth Proportional to 1,638.26, 2,260.68 and 939.50

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Solution

The fourth proportional to 1,638.26, 2,260.68 and 939.50 is: 1,296.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.26 : 2,260.68 = 939.50 : x
  2. Step 2: Convert to fraction form
    1,638.26/2,260.68 = 939.50/x
  3. Step 3: Cross multiply
    1,638.26x = 2,260.68 × 939.50
  4. Step 4: Simplify right side
    1,638.26x = 2,123,908.86
  5. Step 5: Solve for x
    x = 2,123,908.86/1,638.26
  6. Step 6: Final answer
    x = 1,296.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.