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Finding the Fourth Proportional to 3,653.80, 5,480.70 and 2,195.80

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Solution

The fourth proportional to 3,653.80, 5,480.70 and 2,195.80 is: 3,293.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,653.80 : 5,480.70 = 2,195.80 : x
  2. Step 2: Convert to fraction form
    3,653.80/5,480.70 = 2,195.80/x
  3. Step 3: Cross multiply
    3,653.80x = 5,480.70 × 2,195.80
  4. Step 4: Simplify right side
    3,653.80x = 12,034,521.06
  5. Step 5: Solve for x
    x = 12,034,521.06/3,653.80
  6. Step 6: Final answer
    x = 3,293.70

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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.