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Finding the Fourth Proportional to 351,391.80, 525,858.90 and 321,900.60

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Solution

The fourth proportional to 351,391.80, 525,858.90 and 321,900.60 is: 481,725.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,391.80 : 525,858.90 = 321,900.60 : x
  2. Step 2: Convert to fraction form
    351,391.80/525,858.90 = 321,900.60/x
  3. Step 3: Cross multiply
    351,391.80x = 525,858.90 × 321,900.60
  4. Step 4: Simplify right side
    351,391.80x = 169,274,295,425.34
  5. Step 5: Solve for x
    x = 169,274,295,425.34/351,391.80
  6. Step 6: Final answer
    x = 481,725.23

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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.