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Finding the Fourth Proportional to 216,856.80, 324,853.20 and 190,879.20

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Solution

The fourth proportional to 216,856.80, 324,853.20 and 190,879.20 is: 285,938.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,856.80 : 324,853.20 = 190,879.20 : x
  2. Step 2: Convert to fraction form
    216,856.80/324,853.20 = 190,879.20/x
  3. Step 3: Cross multiply
    216,856.80x = 324,853.20 × 190,879.20
  4. Step 4: Simplify right side
    216,856.80x = 62,007,718,933.44
  5. Step 5: Solve for x
    x = 62,007,718,933.44/216,856.80
  6. Step 6: Final answer
    x = 285,938.55

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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.