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Finding the Fourth Proportional to 269,640.80, 404,461.20 and 266,141.60

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Solution

The fourth proportional to 269,640.80, 404,461.20 and 266,141.60 is: 399,212.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,640.80 : 404,461.20 = 266,141.60 : x
  2. Step 2: Convert to fraction form
    269,640.80/404,461.20 = 266,141.60/x
  3. Step 3: Cross multiply
    269,640.80x = 404,461.20 × 266,141.60
  4. Step 4: Simplify right side
    269,640.80x = 107,643,950,905.92
  5. Step 5: Solve for x
    x = 107,643,950,905.92/269,640.80
  6. Step 6: Final answer
    x = 399,212.40

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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.