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Finding the Fourth Proportional to 2,647.95, 3,651.97 and 1,986.27

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Solution

The fourth proportional to 2,647.95, 3,651.97 and 1,986.27 is: 2,739.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,647.95 : 3,651.97 = 1,986.27 : x
  2. Step 2: Convert to fraction form
    2,647.95/3,651.97 = 1,986.27/x
  3. Step 3: Cross multiply
    2,647.95x = 3,651.97 × 1,986.27
  4. Step 4: Simplify right side
    2,647.95x = 7,253,798.45
  5. Step 5: Solve for x
    x = 7,253,798.45/2,647.95
  6. Step 6: Final answer
    x = 2,739.40

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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.