Home / 2,511.40-3,767.70-1,211.80

Finding the Fourth Proportional to 2,511.40, 3,767.70 and 1,211.80

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Solution

The fourth proportional to 2,511.40, 3,767.70 and 1,211.80 is: 1,817.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,511.40 : 3,767.70 = 1,211.80 : x
  2. Step 2: Convert to fraction form
    2,511.40/3,767.70 = 1,211.80/x
  3. Step 3: Cross multiply
    2,511.40x = 3,767.70 × 1,211.80
  4. Step 4: Simplify right side
    2,511.40x = 4,565,698.86
  5. Step 5: Solve for x
    x = 4,565,698.86/2,511.40
  6. Step 6: Final answer
    x = 1,817.99

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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.