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Finding the Fourth Proportional to 258,935.80, 388,245.30 and 100,982.20

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Solution

The fourth proportional to 258,935.80, 388,245.30 and 100,982.20 is: 151,411.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,935.80 : 388,245.30 = 100,982.20 : x
  2. Step 2: Convert to fraction form
    258,935.80/388,245.30 = 100,982.20/x
  3. Step 3: Cross multiply
    258,935.80x = 388,245.30 × 100,982.20
  4. Step 4: Simplify right side
    258,935.80x = 39,205,864,533.66
  5. Step 5: Solve for x
    x = 39,205,864,533.66/258,935.80
  6. Step 6: Final answer
    x = 151,411.53

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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.