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Finding the Fourth Proportional to 401,220, 553,683.60 and 222,372

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Solution

The fourth proportional to 401,220, 553,683.60 and 222,372 is: 306,873.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,220 : 553,683.60 = 222,372 : x
  2. Step 2: Convert to fraction form
    401,220/553,683.60 = 222,372/x
  3. Step 3: Cross multiply
    401,220x = 553,683.60 × 222,372
  4. Step 4: Simplify right side
    401,220x = 123,123,729,499.20
  5. Step 5: Solve for x
    x = 123,123,729,499.20/401,220
  6. Step 6: Final answer
    x = 306,873.36

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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.