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Finding the Fourth Proportional to 258,754.58, 388,008.96 and 90,254.44

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Solution

The fourth proportional to 258,754.58, 388,008.96 and 90,254.44 is: 135,338.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,754.58 : 388,008.96 = 90,254.44 : x
  2. Step 2: Convert to fraction form
    258,754.58/388,008.96 = 90,254.44/x
  3. Step 3: Cross multiply
    258,754.58x = 388,008.96 × 90,254.44
  4. Step 4: Simplify right side
    258,754.58x = 35,019,531,399.78
  5. Step 5: Solve for x
    x = 35,019,531,399.78/258,754.58
  6. Step 6: Final answer
    x = 135,338.79

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1.5x scale

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.