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Finding the Fourth Proportional to 326,991.68, 490,286.79 and 127,078.64

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Solution

The fourth proportional to 326,991.68, 490,286.79 and 127,078.64 is: 190,539.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,991.68 : 490,286.79 = 127,078.64 : x
  2. Step 2: Convert to fraction form
    326,991.68/490,286.79 = 127,078.64/x
  3. Step 3: Cross multiply
    326,991.68x = 490,286.79 × 127,078.64
  4. Step 4: Simplify right side
    326,991.68x = 62,304,976,031.73
  5. Step 5: Solve for x
    x = 62,304,976,031.73/326,991.68
  6. Step 6: Final answer
    x = 190,539.95

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1.5x scale

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.