Home / 1,997.30-2,755.68-1,211.60

Finding the Fourth Proportional to 1,997.30, 2,755.68 and 1,211.60

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Solution

The fourth proportional to 1,997.30, 2,755.68 and 1,211.60 is: 1,671.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,997.30 : 2,755.68 = 1,211.60 : x
  2. Step 2: Convert to fraction form
    1,997.30/2,755.68 = 1,211.60/x
  3. Step 3: Cross multiply
    1,997.30x = 2,755.68 × 1,211.60
  4. Step 4: Simplify right side
    1,997.30x = 3,338,781.89
  5. Step 5: Solve for x
    x = 3,338,781.89/1,997.30
  6. Step 6: Final answer
    x = 1,671.65

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1.5x scale

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.