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Finding the Fourth Proportional to 326,993.36, 490,485.18 and 90,330.80

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Solution

The fourth proportional to 326,993.36, 490,485.18 and 90,330.80 is: 135,494.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,993.36 : 490,485.18 = 90,330.80 : x
  2. Step 2: Convert to fraction form
    326,993.36/490,485.18 = 90,330.80/x
  3. Step 3: Cross multiply
    326,993.36x = 490,485.18 × 90,330.80
  4. Step 4: Simplify right side
    326,993.36x = 44,305,918,697.54
  5. Step 5: Solve for x
    x = 44,305,918,697.54/326,993.36
  6. Step 6: Final answer
    x = 135,494.86

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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.