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Finding the Fourth Proportional to 259,608.80, 389,144.40 and 141,029.60

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Solution

The fourth proportional to 259,608.80, 389,144.40 and 141,029.60 is: 211,398.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,608.80 : 389,144.40 = 141,029.60 : x
  2. Step 2: Convert to fraction form
    259,608.80/389,144.40 = 141,029.60/x
  3. Step 3: Cross multiply
    259,608.80x = 389,144.40 × 141,029.60
  4. Step 4: Simplify right side
    259,608.80x = 54,880,879,074.24
  5. Step 5: Solve for x
    x = 54,880,879,074.24/259,608.80
  6. Step 6: Final answer
    x = 211,398.38

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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.