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Finding the Fourth Proportional to 403,212.20, 604,891.20 and 203,028.80

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Solution

The fourth proportional to 403,212.20, 604,891.20 and 203,028.80 is: 304,579.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,212.20 : 604,891.20 = 203,028.80 : x
  2. Step 2: Convert to fraction form
    403,212.20/604,891.20 = 203,028.80/x
  3. Step 3: Cross multiply
    403,212.20x = 604,891.20 × 203,028.80
  4. Step 4: Simplify right side
    403,212.20x = 122,810,334,466.56
  5. Step 5: Solve for x
    x = 122,810,334,466.56/403,212.20
  6. Step 6: Final answer
    x = 304,579.91

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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.