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Finding the Fourth Proportional to 401,236, 553,705.68 and 222,388

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Solution

The fourth proportional to 401,236, 553,705.68 and 222,388 is: 306,895.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,236 : 553,705.68 = 222,388 : x
  2. Step 2: Convert to fraction form
    401,236/553,705.68 = 222,388/x
  3. Step 3: Cross multiply
    401,236x = 553,705.68 × 222,388
  4. Step 4: Simplify right side
    401,236x = 123,137,498,763.84
  5. Step 5: Solve for x
    x = 123,137,498,763.84/401,236
  6. Step 6: Final answer
    x = 306,895.44

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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.