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Finding the Fourth Proportional to 324,028.84, 485,998.46 and 87,385.80

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Solution

The fourth proportional to 324,028.84, 485,998.46 and 87,385.80 is: 131,066.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,028.84 : 485,998.46 = 87,385.80 : x
  2. Step 2: Convert to fraction form
    324,028.84/485,998.46 = 87,385.80/x
  3. Step 3: Cross multiply
    324,028.84x = 485,998.46 × 87,385.80
  4. Step 4: Simplify right side
    324,028.84x = 42,469,364,225.87
  5. Step 5: Solve for x
    x = 42,469,364,225.87/324,028.84
  6. Step 6: Final answer
    x = 131,066.62

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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.