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Finding the Fourth Proportional to 324,431.38, 486,648.21 and 99,790.30

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Solution

The fourth proportional to 324,431.38, 486,648.21 and 99,790.30 is: 149,685.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,431.38 : 486,648.21 = 99,790.30 : x
  2. Step 2: Convert to fraction form
    324,431.38/486,648.21 = 99,790.30/x
  3. Step 3: Cross multiply
    324,431.38x = 486,648.21 × 99,790.30
  4. Step 4: Simplify right side
    324,431.38x = 48,562,770,870.36
  5. Step 5: Solve for x
    x = 48,562,770,870.36/324,431.38
  6. Step 6: Final answer
    x = 149,685.80

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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.