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Finding the Fourth Proportional to 401,059.28, 553,461.78 and 222,211.28

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Solution

The fourth proportional to 401,059.28, 553,461.78 and 222,211.28 is: 306,651.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,059.28 : 553,461.78 = 222,211.28 : x
  2. Step 2: Convert to fraction form
    401,059.28/553,461.78 = 222,211.28/x
  3. Step 3: Cross multiply
    401,059.28x = 553,461.78 × 222,211.28
  4. Step 4: Simplify right side
    401,059.28x = 122,985,450,564.88
  5. Step 5: Solve for x
    x = 122,985,450,564.88/401,059.28
  6. Step 6: Final answer
    x = 306,651.55

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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.