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Finding the Fourth Proportional to 2,155.94, 2,975.08 and 1,198.80

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Solution

The fourth proportional to 2,155.94, 2,975.08 and 1,198.80 is: 1,654.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.94 : 2,975.08 = 1,198.80 : x
  2. Step 2: Convert to fraction form
    2,155.94/2,975.08 = 1,198.80/x
  3. Step 3: Cross multiply
    2,155.94x = 2,975.08 × 1,198.80
  4. Step 4: Simplify right side
    2,155.94x = 3,566,525.90
  5. Step 5: Solve for x
    x = 3,566,525.90/2,155.94
  6. Step 6: Final answer
    x = 1,654.28

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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.