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Finding the Fourth Proportional to 2,638.09, 3,958.98 and 1,946.55

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Solution

The fourth proportional to 2,638.09, 3,958.98 and 1,946.55 is: 2,921.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,638.09 : 3,958.98 = 1,946.55 : x
  2. Step 2: Convert to fraction form
    2,638.09/3,958.98 = 1,946.55/x
  3. Step 3: Cross multiply
    2,638.09x = 3,958.98 × 1,946.55
  4. Step 4: Simplify right side
    2,638.09x = 7,706,352.52
  5. Step 5: Solve for x
    x = 7,706,352.52/2,638.09
  6. Step 6: Final answer
    x = 2,921.19

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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.