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Finding the Fourth Proportional to 326,895.96, 490,372.16 and 90,238.68

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Solution

The fourth proportional to 326,895.96, 490,372.16 and 90,238.68 is: 135,365.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,895.96 : 490,372.16 = 90,238.68 : x
  2. Step 2: Convert to fraction form
    326,895.96/490,372.16 = 90,238.68/x
  3. Step 3: Cross multiply
    326,895.96x = 490,372.16 × 90,238.68
  4. Step 4: Simplify right side
    326,895.96x = 44,250,536,427.15
  5. Step 5: Solve for x
    x = 44,250,536,427.15/326,895.96
  6. Step 6: Final answer
    x = 135,365.81

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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.