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Finding the Fourth Proportional to 521,375.09, 782,358.23 and 281,485.79

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Solution

The fourth proportional to 521,375.09, 782,358.23 and 281,485.79 is: 422,388.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,375.09 : 782,358.23 = 281,485.79 : x
  2. Step 2: Convert to fraction form
    521,375.09/782,358.23 = 281,485.79/x
  3. Step 3: Cross multiply
    521,375.09x = 782,358.23 × 281,485.79
  4. Step 4: Simplify right side
    521,375.09x = 220,222,724,434.55
  5. Step 5: Solve for x
    x = 220,222,724,434.55/521,375.09
  6. Step 6: Final answer
    x = 422,388.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.