Home / 1,991.81-2,966.68-1,887.73

Finding the Fourth Proportional to 1,991.81, 2,966.68 and 1,887.73

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Solution

The fourth proportional to 1,991.81, 2,966.68 and 1,887.73 is: 2,811.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.81 : 2,966.68 = 1,887.73 : x
  2. Step 2: Convert to fraction form
    1,991.81/2,966.68 = 1,887.73/x
  3. Step 3: Cross multiply
    1,991.81x = 2,966.68 × 1,887.73
  4. Step 4: Simplify right side
    1,991.81x = 5,600,285.78
  5. Step 5: Solve for x
    x = 5,600,285.78/1,991.81
  6. Step 6: Final answer
    x = 2,811.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.