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Finding the Fourth Proportional to 401,438.52, 553,991.40 and 220,167

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Solution

The fourth proportional to 401,438.52, 553,991.40 and 220,167 is: 303,833.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,438.52 : 553,991.40 = 220,167 : x
  2. Step 2: Convert to fraction form
    401,438.52/553,991.40 = 220,167/x
  3. Step 3: Cross multiply
    401,438.52x = 553,991.40 × 220,167
  4. Step 4: Simplify right side
    401,438.52x = 121,970,624,563.80
  5. Step 5: Solve for x
    x = 121,970,624,563.80/401,438.52
  6. Step 6: Final answer
    x = 303,833.88

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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.