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Finding the Fourth Proportional to 258,825.87, 388,332.23 and 90,371.00

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Solution

The fourth proportional to 258,825.87, 388,332.23 and 90,371.00 is: 135,589.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,825.87 : 388,332.23 = 90,371.00 : x
  2. Step 2: Convert to fraction form
    258,825.87/388,332.23 = 90,371.00/x
  3. Step 3: Cross multiply
    258,825.87x = 388,332.23 × 90,371.00
  4. Step 4: Simplify right side
    258,825.87x = 35,093,972,476.31
  5. Step 5: Solve for x
    x = 35,093,972,476.31/258,825.87
  6. Step 6: Final answer
    x = 135,589.12

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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.