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Finding the Fourth Proportional to 326,902.35, 490,381.73 and 90,245.05

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Solution

The fourth proportional to 326,902.35, 490,381.73 and 90,245.05 is: 135,375.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,902.35 : 490,381.73 = 90,245.05 : x
  2. Step 2: Convert to fraction form
    326,902.35/490,381.73 = 90,245.05/x
  3. Step 3: Cross multiply
    326,902.35x = 490,381.73 × 90,245.05
  4. Step 4: Simplify right side
    326,902.35x = 44,254,523,968.55
  5. Step 5: Solve for x
    x = 44,254,523,968.55/326,902.35
  6. Step 6: Final answer
    x = 135,375.36

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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.