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Finding the Fourth Proportional to 3,641.60, 5,449.80 and 2,181.80

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Solution

The fourth proportional to 3,641.60, 5,449.80 and 2,181.80 is: 3,265.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,641.60 : 5,449.80 = 2,181.80 : x
  2. Step 2: Convert to fraction form
    3,641.60/5,449.80 = 2,181.80/x
  3. Step 3: Cross multiply
    3,641.60x = 5,449.80 × 2,181.80
  4. Step 4: Simplify right side
    3,641.60x = 11,890,373.64
  5. Step 5: Solve for x
    x = 11,890,373.64/3,641.60
  6. Step 6: Final answer
    x = 3,265.15

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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.