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Finding the Fourth Proportional to 379,930.76, 569,896.03 and 143,218.09

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Solution

The fourth proportional to 379,930.76, 569,896.03 and 143,218.09 is: 214,827.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,930.76 : 569,896.03 = 143,218.09 : x
  2. Step 2: Convert to fraction form
    379,930.76/569,896.03 = 143,218.09/x
  3. Step 3: Cross multiply
    379,930.76x = 569,896.03 × 143,218.09
  4. Step 4: Simplify right side
    379,930.76x = 81,619,418,600.91
  5. Step 5: Solve for x
    x = 81,619,418,600.91/379,930.76
  6. Step 6: Final answer
    x = 214,827.08

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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.