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Finding the Fourth Proportional to 663,139.80, 994,604.10 and 219,907.80

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Solution

The fourth proportional to 663,139.80, 994,604.10 and 219,907.80 is: 329,826.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,139.80 : 994,604.10 = 219,907.80 : x
  2. Step 2: Convert to fraction form
    663,139.80/994,604.10 = 219,907.80/x
  3. Step 3: Cross multiply
    663,139.80x = 994,604.10 × 219,907.80
  4. Step 4: Simplify right side
    663,139.80x = 218,721,199,501.98
  5. Step 5: Solve for x
    x = 218,721,199,501.98/663,139.80
  6. Step 6: Final answer
    x = 329,826.68

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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.