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Finding the Fourth Proportional to 379,605.80, 569,627.40 and 143,118.20

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Solution

The fourth proportional to 379,605.80, 569,627.40 and 143,118.20 is: 214,759.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,605.80 : 569,627.40 = 143,118.20 : x
  2. Step 2: Convert to fraction form
    379,605.80/569,627.40 = 143,118.20/x
  3. Step 3: Cross multiply
    379,605.80x = 569,627.40 × 143,118.20
  4. Step 4: Simplify right side
    379,605.80x = 81,524,048,158.68
  5. Step 5: Solve for x
    x = 81,524,048,158.68/379,605.80
  6. Step 6: Final answer
    x = 214,759.75

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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.