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Finding the Fourth Proportional to 1,997.78, 2,992.08 and 1,928.60

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Solution

The fourth proportional to 1,997.78, 2,992.08 and 1,928.60 is: 2,888.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,997.78 : 2,992.08 = 1,928.60 : x
  2. Step 2: Convert to fraction form
    1,997.78/2,992.08 = 1,928.60/x
  3. Step 3: Cross multiply
    1,997.78x = 2,992.08 × 1,928.60
  4. Step 4: Simplify right side
    1,997.78x = 5,770,525.49
  5. Step 5: Solve for x
    x = 5,770,525.49/1,997.78
  6. Step 6: Final answer
    x = 2,888.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.