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Finding the Fourth Proportional to 401,066.25, 553,471.43 and 239,928.09

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Solution

The fourth proportional to 401,066.25, 553,471.43 and 239,928.09 is: 331,100.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,066.25 : 553,471.43 = 239,928.09 : x
  2. Step 2: Convert to fraction form
    401,066.25/553,471.43 = 239,928.09/x
  3. Step 3: Cross multiply
    401,066.25x = 553,471.43 × 239,928.09
  4. Step 4: Simplify right side
    401,066.25x = 132,793,341,869.83
  5. Step 5: Solve for x
    x = 132,793,341,869.83/401,066.25
  6. Step 6: Final answer
    x = 331,100.76

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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.