Home / 1,318,906.20-1,979,015.40-520,213.80

Finding the Fourth Proportional to 1,318,906.20, 1,979,015.40 and 520,213.80

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Solution

The fourth proportional to 1,318,906.20, 1,979,015.40 and 520,213.80 is: 780,579.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,906.20 : 1,979,015.40 = 520,213.80 : x
  2. Step 2: Convert to fraction form
    1,318,906.20/1,979,015.40 = 520,213.80/x
  3. Step 3: Cross multiply
    1,318,906.20x = 1,979,015.40 × 520,213.80
  4. Step 4: Simplify right side
    1,318,906.20x = 1,029,511,121,492.52
  5. Step 5: Solve for x
    x = 1,029,511,121,492.52/1,318,906.20
  6. Step 6: Final answer
    x = 780,579.48

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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.