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Finding the Fourth Proportional to 259,008.78, 388,562.38 and 90,576.98

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Solution

The fourth proportional to 259,008.78, 388,562.38 and 90,576.98 is: 135,882.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,008.78 : 388,562.38 = 90,576.98 : x
  2. Step 2: Convert to fraction form
    259,008.78/388,562.38 = 90,576.98/x
  3. Step 3: Cross multiply
    259,008.78x = 388,562.38 × 90,576.98
  4. Step 4: Simplify right side
    259,008.78x = 35,194,806,922.01
  5. Step 5: Solve for x
    x = 35,194,806,922.01/259,008.78
  6. Step 6: Final answer
    x = 135,882.68

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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.