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Finding the Fourth Proportional to 326,888.59, 490,361.03 and 90,231.28

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Solution

The fourth proportional to 326,888.59, 490,361.03 and 90,231.28 is: 135,354.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,888.59 : 490,361.03 = 90,231.28 : x
  2. Step 2: Convert to fraction form
    326,888.59/490,361.03 = 90,231.28/x
  3. Step 3: Cross multiply
    326,888.59x = 490,361.03 × 90,231.28
  4. Step 4: Simplify right side
    326,888.59x = 44,245,903,399.02
  5. Step 5: Solve for x
    x = 44,245,903,399.02/326,888.59
  6. Step 6: Final answer
    x = 135,354.69

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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.