Home / 1,778.10-2,450.40-1,279.86

Finding the Fourth Proportional to 1,778.10, 2,450.40 and 1,279.86

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Solution

The fourth proportional to 1,778.10, 2,450.40 and 1,279.86 is: 1,763.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.10 : 2,450.40 = 1,279.86 : x
  2. Step 2: Convert to fraction form
    1,778.10/2,450.40 = 1,279.86/x
  3. Step 3: Cross multiply
    1,778.10x = 2,450.40 × 1,279.86
  4. Step 4: Simplify right side
    1,778.10x = 3,136,168.94
  5. Step 5: Solve for x
    x = 3,136,168.94/1,778.10
  6. Step 6: Final answer
    x = 1,763.78

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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.