Home / 1,690.90-2,537.26-1,279.94

Finding the Fourth Proportional to 1,690.90, 2,537.26 and 1,279.94

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Solution

The fourth proportional to 1,690.90, 2,537.26 and 1,279.94 is: 1,920.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.90 : 2,537.26 = 1,279.94 : x
  2. Step 2: Convert to fraction form
    1,690.90/2,537.26 = 1,279.94/x
  3. Step 3: Cross multiply
    1,690.90x = 2,537.26 × 1,279.94
  4. Step 4: Simplify right side
    1,690.90x = 3,247,524.68
  5. Step 5: Solve for x
    x = 3,247,524.68/1,690.90
  6. Step 6: Final answer
    x = 1,920.59

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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.