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Finding the Fourth Proportional to 326,682.48, 490,040.46 and 90,019.92

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Solution

The fourth proportional to 326,682.48, 490,040.46 and 90,019.92 is: 135,034.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,682.48 : 490,040.46 = 90,019.92 : x
  2. Step 2: Convert to fraction form
    326,682.48/490,040.46 = 90,019.92/x
  3. Step 3: Cross multiply
    326,682.48x = 490,040.46 × 90,019.92
  4. Step 4: Simplify right side
    326,682.48x = 44,113,403,005.96
  5. Step 5: Solve for x
    x = 44,113,403,005.96/326,682.48
  6. Step 6: Final answer
    x = 135,034.49

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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.