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Finding the Fourth Proportional to 3,652.88, 5,479.80 and 1,921.60

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Solution

The fourth proportional to 3,652.88, 5,479.80 and 1,921.60 is: 2,882.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,652.88 : 5,479.80 = 1,921.60 : x
  2. Step 2: Convert to fraction form
    3,652.88/5,479.80 = 1,921.60/x
  3. Step 3: Cross multiply
    3,652.88x = 5,479.80 × 1,921.60
  4. Step 4: Simplify right side
    3,652.88x = 10,529,983.68
  5. Step 5: Solve for x
    x = 10,529,983.68/3,652.88
  6. Step 6: Final answer
    x = 2,882.65

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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.