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Finding the Fourth Proportional to 326,790.63, 490,605.74 and 251,958.31

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Solution

The fourth proportional to 326,790.63, 490,605.74 and 251,958.31 is: 378,261.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,790.63 : 490,605.74 = 251,958.31 : x
  2. Step 2: Convert to fraction form
    326,790.63/490,605.74 = 251,958.31/x
  3. Step 3: Cross multiply
    326,790.63x = 490,605.74 × 251,958.31
  4. Step 4: Simplify right side
    326,790.63x = 123,612,193,126.70
  5. Step 5: Solve for x
    x = 123,612,193,126.70/326,790.63
  6. Step 6: Final answer
    x = 378,261.13

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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.