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Finding the Fourth Proportional to 324,425.20, 486,551.40 and 99,785.20

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Solution

The fourth proportional to 324,425.20, 486,551.40 and 99,785.20 is: 149,651.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,425.20 : 486,551.40 = 99,785.20 : x
  2. Step 2: Convert to fraction form
    324,425.20/486,551.40 = 99,785.20/x
  3. Step 3: Cross multiply
    324,425.20x = 486,551.40 × 99,785.20
  4. Step 4: Simplify right side
    324,425.20x = 48,550,628,759.28
  5. Step 5: Solve for x
    x = 48,550,628,759.28/324,425.20
  6. Step 6: Final answer
    x = 149,651.23

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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.