Home / 258,849.82-388,387.79-90,491.02

Finding the Fourth Proportional to 258,849.82, 388,387.79 and 90,491.02

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Solution

The fourth proportional to 258,849.82, 388,387.79 and 90,491.02 is: 135,776.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,849.82 : 388,387.79 = 90,491.02 : x
  2. Step 2: Convert to fraction form
    258,849.82/388,387.79 = 90,491.02/x
  3. Step 3: Cross multiply
    258,849.82x = 388,387.79 × 90,491.02
  4. Step 4: Simplify right side
    258,849.82x = 35,145,607,272.65
  5. Step 5: Solve for x
    x = 35,145,607,272.65/258,849.82
  6. Step 6: Final answer
    x = 135,776.05

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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.