Home / 258,811.49-388,094.07-90,311.34

Finding the Fourth Proportional to 258,811.49, 388,094.07 and 90,311.34

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Solution

The fourth proportional to 258,811.49, 388,094.07 and 90,311.34 is: 135,424.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,811.49 : 388,094.07 = 90,311.34 : x
  2. Step 2: Convert to fraction form
    258,811.49/388,094.07 = 90,311.34/x
  3. Step 3: Cross multiply
    258,811.49x = 388,094.07 × 90,311.34
  4. Step 4: Simplify right side
    258,811.49x = 35,049,295,507.75
  5. Step 5: Solve for x
    x = 35,049,295,507.75/258,811.49
  6. Step 6: Final answer
    x = 135,424.03

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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.