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Finding the Fourth Proportional to 379,817.80, 569,370.30 and 143,319.40

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Solution

The fourth proportional to 379,817.80, 569,370.30 and 143,319.40 is: 214,844.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,817.80 : 569,370.30 = 143,319.40 : x
  2. Step 2: Convert to fraction form
    379,817.80/569,370.30 = 143,319.40/x
  3. Step 3: Cross multiply
    379,817.80x = 569,370.30 × 143,319.40
  4. Step 4: Simplify right side
    379,817.80x = 81,601,809,773.82
  5. Step 5: Solve for x
    x = 81,601,809,773.82/379,817.80
  6. Step 6: Final answer
    x = 214,844.62

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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.