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Finding the Fourth Proportional to 519,093.80, 778,583.10 and 425,436.20

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Solution

The fourth proportional to 519,093.80, 778,583.10 and 425,436.20 is: 638,107.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,093.80 : 778,583.10 = 425,436.20 : x
  2. Step 2: Convert to fraction form
    519,093.80/778,583.10 = 425,436.20/x
  3. Step 3: Cross multiply
    519,093.80x = 778,583.10 × 425,436.20
  4. Step 4: Simplify right side
    519,093.80x = 331,237,435,448.22
  5. Step 5: Solve for x
    x = 331,237,435,448.22/519,093.80
  6. Step 6: Final answer
    x = 638,107.09

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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.