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Finding the Fourth Proportional to 418,664.80, 627,997.20 and 404,230.60

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Solution

The fourth proportional to 418,664.80, 627,997.20 and 404,230.60 is: 606,345.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,664.80 : 627,997.20 = 404,230.60 : x
  2. Step 2: Convert to fraction form
    418,664.80/627,997.20 = 404,230.60/x
  3. Step 3: Cross multiply
    418,664.80x = 627,997.20 × 404,230.60
  4. Step 4: Simplify right side
    418,664.80x = 253,855,684,954.32
  5. Step 5: Solve for x
    x = 253,855,684,954.32/418,664.80
  6. Step 6: Final answer
    x = 606,345.90

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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.