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Finding the Fourth Proportional to 644,428.80, 966,988.80 and 270,489.60

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Solution

The fourth proportional to 644,428.80, 966,988.80 and 270,489.60 is: 405,879.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,428.80 : 966,988.80 = 270,489.60 : x
  2. Step 2: Convert to fraction form
    644,428.80/966,988.80 = 270,489.60/x
  3. Step 3: Cross multiply
    644,428.80x = 966,988.80 × 270,489.60
  4. Step 4: Simplify right side
    644,428.80x = 261,560,413,716.48
  5. Step 5: Solve for x
    x = 261,560,413,716.48/644,428.80
  6. Step 6: Final answer
    x = 405,879.46

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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.