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Finding the Fourth Proportional to 449,511.90, 674,267.85 and 428,775.90

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Solution

The fourth proportional to 449,511.90, 674,267.85 and 428,775.90 is: 643,163.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,511.90 : 674,267.85 = 428,775.90 : x
  2. Step 2: Convert to fraction form
    449,511.90/674,267.85 = 428,775.90/x
  3. Step 3: Cross multiply
    449,511.90x = 674,267.85 × 428,775.90
  4. Step 4: Simplify right side
    449,511.90x = 289,109,804,224.82
  5. Step 5: Solve for x
    x = 289,109,804,224.82/449,511.90
  6. Step 6: Final answer
    x = 643,163.85

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Similar ratio
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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.