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Finding the Fourth Proportional to 379,685.88, 569,567.70 and 143,227.44

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Solution

The fourth proportional to 379,685.88, 569,567.70 and 143,227.44 is: 214,855.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,685.88 : 569,567.70 = 143,227.44 : x
  2. Step 2: Convert to fraction form
    379,685.88/569,567.70 = 143,227.44/x
  3. Step 3: Cross multiply
    379,685.88x = 569,567.70 × 143,227.44
  4. Step 4: Simplify right side
    379,685.88x = 81,577,723,577.69
  5. Step 5: Solve for x
    x = 81,577,723,577.69/379,685.88
  6. Step 6: Final answer
    x = 214,855.83

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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.