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Finding the Fourth Proportional to 269,957.80, 404,936.70 and 266,021.20

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Solution

The fourth proportional to 269,957.80, 404,936.70 and 266,021.20 is: 399,031.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,957.80 : 404,936.70 = 266,021.20 : x
  2. Step 2: Convert to fraction form
    269,957.80/404,936.70 = 266,021.20/x
  3. Step 3: Cross multiply
    269,957.80x = 404,936.70 × 266,021.20
  4. Step 4: Simplify right side
    269,957.80x = 107,721,746,858.04
  5. Step 5: Solve for x
    x = 107,721,746,858.04/269,957.80
  6. Step 6: Final answer
    x = 399,031.80

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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.