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Finding the Fourth Proportional to 538,806.10, 809,375.55 and 518,977.30

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Solution

The fourth proportional to 538,806.10, 809,375.55 and 518,977.30 is: 779,589.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,806.10 : 809,375.55 = 518,977.30 : x
  2. Step 2: Convert to fraction form
    538,806.10/809,375.55 = 518,977.30/x
  3. Step 3: Cross multiply
    538,806.10x = 809,375.55 × 518,977.30
  4. Step 4: Simplify right side
    538,806.10x = 420,047,537,625.02
  5. Step 5: Solve for x
    x = 420,047,537,625.02/538,806.10
  6. Step 6: Final answer
    x = 779,589.42

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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.