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Finding the Fourth Proportional to 258,903.38, 388,448.22 and 90,448.49

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Solution

The fourth proportional to 258,903.38, 388,448.22 and 90,448.49 is: 135,705.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,903.38 : 388,448.22 = 90,448.49 : x
  2. Step 2: Convert to fraction form
    258,903.38/388,448.22 = 90,448.49/x
  3. Step 3: Cross multiply
    258,903.38x = 388,448.22 × 90,448.49
  4. Step 4: Simplify right side
    258,903.38x = 35,134,554,942.19
  5. Step 5: Solve for x
    x = 35,134,554,942.19/258,903.38
  6. Step 6: Final answer
    x = 135,705.28

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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.