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Finding the Fourth Proportional to 326,906.22, 490,387.54 and 90,248.92

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Solution

The fourth proportional to 326,906.22, 490,387.54 and 90,248.92 is: 135,381.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,906.22 : 490,387.54 = 90,248.92 : x
  2. Step 2: Convert to fraction form
    326,906.22/490,387.54 = 90,248.92/x
  3. Step 3: Cross multiply
    326,906.22x = 490,387.54 × 90,248.92
  4. Step 4: Simplify right side
    326,906.22x = 44,256,945,866.46
  5. Step 5: Solve for x
    x = 44,256,945,866.46/326,906.22
  6. Step 6: Final answer
    x = 135,381.17

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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.