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Finding the Fourth Proportional to 324,809.20, 486,954.60 and 137,666.80

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Solution

The fourth proportional to 324,809.20, 486,954.60 and 137,666.80 is: 206,390.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,809.20 : 486,954.60 = 137,666.80 : x
  2. Step 2: Convert to fraction form
    324,809.20/486,954.60 = 137,666.80/x
  3. Step 3: Cross multiply
    324,809.20x = 486,954.60 × 137,666.80
  4. Step 4: Simplify right side
    324,809.20x = 67,037,481,527.28
  5. Step 5: Solve for x
    x = 67,037,481,527.28/324,809.20
  6. Step 6: Final answer
    x = 206,390.34

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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.