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Finding the Fourth Proportional to 379,825.80, 569,382.30 and 143,327.40

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Solution

The fourth proportional to 379,825.80, 569,382.30 and 143,327.40 is: 214,856.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,825.80 : 569,382.30 = 143,327.40 : x
  2. Step 2: Convert to fraction form
    379,825.80/569,382.30 = 143,327.40/x
  3. Step 3: Cross multiply
    379,825.80x = 569,382.30 × 143,327.40
  4. Step 4: Simplify right side
    379,825.80x = 81,608,084,665.02
  5. Step 5: Solve for x
    x = 81,608,084,665.02/379,825.80
  6. Step 6: Final answer
    x = 214,856.61

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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.