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Finding the Fourth Proportional to 326,857.40, 490,272.70 and 90,194.03

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Solution

The fourth proportional to 326,857.40, 490,272.70 and 90,194.03 is: 135,287.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,857.40 : 490,272.70 = 90,194.03 : x
  2. Step 2: Convert to fraction form
    326,857.40/490,272.70 = 90,194.03/x
  3. Step 3: Cross multiply
    326,857.40x = 490,272.70 × 90,194.03
  4. Step 4: Simplify right side
    326,857.40x = 44,219,670,611.98
  5. Step 5: Solve for x
    x = 44,219,670,611.98/326,857.40
  6. Step 6: Final answer
    x = 135,287.35

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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.