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Finding the Fourth Proportional to 3,246.40, 4,480.80 and 2,068.80

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Solution

The fourth proportional to 3,246.40, 4,480.80 and 2,068.80 is: 2,855.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,246.40 : 4,480.80 = 2,068.80 : x
  2. Step 2: Convert to fraction form
    3,246.40/4,480.80 = 2,068.80/x
  3. Step 3: Cross multiply
    3,246.40x = 4,480.80 × 2,068.80
  4. Step 4: Simplify right side
    3,246.40x = 9,269,879.04
  5. Step 5: Solve for x
    x = 9,269,879.04/3,246.40
  6. Step 6: Final answer
    x = 2,855.43

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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.