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Finding the Fourth Proportional to 1,883.78, 2,601.16 and 1,221.76

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Solution

The fourth proportional to 1,883.78, 2,601.16 and 1,221.76 is: 1,687.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,883.78 : 2,601.16 = 1,221.76 : x
  2. Step 2: Convert to fraction form
    1,883.78/2,601.16 = 1,221.76/x
  3. Step 3: Cross multiply
    1,883.78x = 2,601.16 × 1,221.76
  4. Step 4: Simplify right side
    1,883.78x = 3,177,993.00
  5. Step 5: Solve for x
    x = 3,177,993.00/1,883.78
  6. Step 6: Final answer
    x = 1,687.03

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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.