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Finding the Fourth Proportional to 1,800.74, 2,698.41 and 1,389.26

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Solution

The fourth proportional to 1,800.74, 2,698.41 and 1,389.26 is: 2,081.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,800.74 : 2,698.41 = 1,389.26 : x
  2. Step 2: Convert to fraction form
    1,800.74/2,698.41 = 1,389.26/x
  3. Step 3: Cross multiply
    1,800.74x = 2,698.41 × 1,389.26
  4. Step 4: Simplify right side
    1,800.74x = 3,748,793.08
  5. Step 5: Solve for x
    x = 3,748,793.08/1,800.74
  6. Step 6: Final answer
    x = 2,081.81

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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.