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Finding the Fourth Proportional to 324,010.40, 486,015.60 and 205,815.20

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Solution

The fourth proportional to 324,010.40, 486,015.60 and 205,815.20 is: 308,722.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,010.40 : 486,015.60 = 205,815.20 : x
  2. Step 2: Convert to fraction form
    324,010.40/486,015.60 = 205,815.20/x
  3. Step 3: Cross multiply
    324,010.40x = 486,015.60 × 205,815.20
  4. Step 4: Simplify right side
    324,010.40x = 100,029,397,917.12
  5. Step 5: Solve for x
    x = 100,029,397,917.12/324,010.40
  6. Step 6: Final answer
    x = 308,722.80

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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.