Home / 258,825.12-388,331.10-90,370.26

Finding the Fourth Proportional to 258,825.12, 388,331.10 and 90,370.26

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Solution

The fourth proportional to 258,825.12, 388,331.10 and 90,370.26 is: 135,588.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,825.12 : 388,331.10 = 90,370.26 : x
  2. Step 2: Convert to fraction form
    258,825.12/388,331.10 = 90,370.26/x
  3. Step 3: Cross multiply
    258,825.12x = 388,331.10 × 90,370.26
  4. Step 4: Simplify right side
    258,825.12x = 35,093,582,473.09
  5. Step 5: Solve for x
    x = 35,093,582,473.09/258,825.12
  6. Step 6: Final answer
    x = 135,588.01

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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.