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Finding the Fourth Proportional to 388,662.20, 581,610.90 and 269,775.80

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Solution

The fourth proportional to 388,662.20, 581,610.90 and 269,775.80 is: 403,704.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,662.20 : 581,610.90 = 269,775.80 : x
  2. Step 2: Convert to fraction form
    388,662.20/581,610.90 = 269,775.80/x
  3. Step 3: Cross multiply
    388,662.20x = 581,610.90 × 269,775.80
  4. Step 4: Simplify right side
    388,662.20x = 156,904,545,836.22
  5. Step 5: Solve for x
    x = 156,904,545,836.22/388,662.20
  6. Step 6: Final answer
    x = 403,704.16

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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.