Home / 1,910.67-2,636.28-1,211.64

Finding the Fourth Proportional to 1,910.67, 2,636.28 and 1,211.64

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Solution

The fourth proportional to 1,910.67, 2,636.28 and 1,211.64 is: 1,671.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,910.67 : 2,636.28 = 1,211.64 : x
  2. Step 2: Convert to fraction form
    1,910.67/2,636.28 = 1,211.64/x
  3. Step 3: Cross multiply
    1,910.67x = 2,636.28 × 1,211.64
  4. Step 4: Simplify right side
    1,910.67x = 3,194,222.30
  5. Step 5: Solve for x
    x = 3,194,222.30/1,910.67
  6. Step 6: Final answer
    x = 1,671.78

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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.