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Finding the Fourth Proportional to 403,709.80, 605,418.90 and 203,963.80

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Solution

The fourth proportional to 403,709.80, 605,418.90 and 203,963.80 is: 305,872.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,709.80 : 605,418.90 = 203,963.80 : x
  2. Step 2: Convert to fraction form
    403,709.80/605,418.90 = 203,963.80/x
  3. Step 3: Cross multiply
    403,709.80x = 605,418.90 × 203,963.80
  4. Step 4: Simplify right side
    403,709.80x = 123,483,539,435.82
  5. Step 5: Solve for x
    x = 123,483,539,435.82/403,709.80
  6. Step 6: Final answer
    x = 305,872.04

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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.