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Finding the Fourth Proportional to 2,639.41, 3,639.41 and 1,974.13

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Solution

The fourth proportional to 2,639.41, 3,639.41 and 1,974.13 is: 2,722.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.41 : 3,639.41 = 1,974.13 : x
  2. Step 2: Convert to fraction form
    2,639.41/3,639.41 = 1,974.13/x
  3. Step 3: Cross multiply
    2,639.41x = 3,639.41 × 1,974.13
  4. Step 4: Simplify right side
    2,639.41x = 7,184,658.59
  5. Step 5: Solve for x
    x = 7,184,658.59/2,639.41
  6. Step 6: Final answer
    x = 2,722.07

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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.