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Finding the Fourth Proportional to 401,363.40, 553,906.34 and 222,515.40

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Solution

The fourth proportional to 401,363.40, 553,906.34 and 222,515.40 is: 307,085.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,363.40 : 553,906.34 = 222,515.40 : x
  2. Step 2: Convert to fraction form
    401,363.40/553,906.34 = 222,515.40/x
  3. Step 3: Cross multiply
    401,363.40x = 553,906.34 × 222,515.40
  4. Step 4: Simplify right side
    401,363.40x = 123,252,690,807.64
  5. Step 5: Solve for x
    x = 123,252,690,807.64/401,363.40
  6. Step 6: Final answer
    x = 307,085.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.