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Finding the Fourth Proportional to 3,558.80, 4,911.22 and 1,986.90

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Solution

The fourth proportional to 3,558.80, 4,911.22 and 1,986.90 is: 2,741.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,558.80 : 4,911.22 = 1,986.90 : x
  2. Step 2: Convert to fraction form
    3,558.80/4,911.22 = 1,986.90/x
  3. Step 3: Cross multiply
    3,558.80x = 4,911.22 × 1,986.90
  4. Step 4: Simplify right side
    3,558.80x = 9,758,087.08
  5. Step 5: Solve for x
    x = 9,758,087.08/3,558.80
  6. Step 6: Final answer
    x = 2,741.96

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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.