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Finding the Fourth Proportional to 744,900.80, 1,027,891.94 and 418,138.94

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Solution

The fourth proportional to 744,900.80, 1,027,891.94 and 418,138.94 is: 576,991.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    744,900.80 : 1,027,891.94 = 418,138.94 : x
  2. Step 2: Convert to fraction form
    744,900.80/1,027,891.94 = 418,138.94/x
  3. Step 3: Cross multiply
    744,900.80x = 1,027,891.94 × 418,138.94
  4. Step 4: Simplify right side
    744,900.80x = 429,801,638,995.99
  5. Step 5: Solve for x
    x = 429,801,638,995.99/744,900.80
  6. Step 6: Final answer
    x = 576,991.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.