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Finding the Fourth Proportional to 326,903.22, 490,383.05 and 90,245.93

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Solution

The fourth proportional to 326,903.22, 490,383.05 and 90,245.93 is: 135,376.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,903.22 : 490,383.05 = 90,245.93 : x
  2. Step 2: Convert to fraction form
    326,903.22/490,383.05 = 90,245.93/x
  3. Step 3: Cross multiply
    326,903.22x = 490,383.05 × 90,245.93
  4. Step 4: Simplify right side
    326,903.22x = 44,255,071,500.34
  5. Step 5: Solve for x
    x = 44,255,071,500.34/326,903.22
  6. Step 6: Final answer
    x = 135,376.68

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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.