Home / 1,991.32-2,747.46-1,205.62

Finding the Fourth Proportional to 1,991.32, 2,747.46 and 1,205.62

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Solution

The fourth proportional to 1,991.32, 2,747.46 and 1,205.62 is: 1,663.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.32 : 2,747.46 = 1,205.62 : x
  2. Step 2: Convert to fraction form
    1,991.32/2,747.46 = 1,205.62/x
  3. Step 3: Cross multiply
    1,991.32x = 2,747.46 × 1,205.62
  4. Step 4: Simplify right side
    1,991.32x = 3,312,392.73
  5. Step 5: Solve for x
    x = 3,312,392.73/1,991.32
  6. Step 6: Final answer
    x = 1,663.42

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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.