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Finding the Fourth Proportional to 216,842.80, 324,832.20 and 190,865.20

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Solution

The fourth proportional to 216,842.80, 324,832.20 and 190,865.20 is: 285,917.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,842.80 : 324,832.20 = 190,865.20 : x
  2. Step 2: Convert to fraction form
    216,842.80/324,832.20 = 190,865.20/x
  3. Step 3: Cross multiply
    216,842.80x = 324,832.20 × 190,865.20
  4. Step 4: Simplify right side
    216,842.80x = 61,999,162,819.44
  5. Step 5: Solve for x
    x = 61,999,162,819.44/216,842.80
  6. Step 6: Final answer
    x = 285,917.55

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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.