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Finding the Fourth Proportional to 326,843.55, 490,293.59 and 90,186.23

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Solution

The fourth proportional to 326,843.55, 490,293.59 and 90,186.23 is: 135,287.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,843.55 : 490,293.59 = 90,186.23 : x
  2. Step 2: Convert to fraction form
    326,843.55/490,293.59 = 90,186.23/x
  3. Step 3: Cross multiply
    326,843.55x = 490,293.59 × 90,186.23
  4. Step 4: Simplify right side
    326,843.55x = 44,217,731,250.07
  5. Step 5: Solve for x
    x = 44,217,731,250.07/326,843.55
  6. Step 6: Final answer
    x = 135,287.15

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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.