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Finding the Fourth Proportional to 1,919,855.52, 2,880,212.78 and 721,788.22

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Solution

The fourth proportional to 1,919,855.52, 2,880,212.78 and 721,788.22 is: 1,082,843.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919,855.52 : 2,880,212.78 = 721,788.22 : x
  2. Step 2: Convert to fraction form
    1,919,855.52/2,880,212.78 = 721,788.22/x
  3. Step 3: Cross multiply
    1,919,855.52x = 2,880,212.78 × 721,788.22
  4. Step 4: Simplify right side
    1,919,855.52x = 2,078,903,644,900.99
  5. Step 5: Solve for x
    x = 2,078,903,644,900.99/1,919,855.52
  6. Step 6: Final answer
    x = 1,082,843.80

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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.