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Finding the Fourth Proportional to 379,826.80, 569,383.80 and 143,328.40

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Solution

The fourth proportional to 379,826.80, 569,383.80 and 143,328.40 is: 214,858.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,826.80 : 569,383.80 = 143,328.40 : x
  2. Step 2: Convert to fraction form
    379,826.80/569,383.80 = 143,328.40/x
  3. Step 3: Cross multiply
    379,826.80x = 569,383.80 × 143,328.40
  4. Step 4: Simplify right side
    379,826.80x = 81,608,869,039.92
  5. Step 5: Solve for x
    x = 81,608,869,039.92/379,826.80
  6. Step 6: Final answer
    x = 214,858.11

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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.