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Finding the Fourth Proportional to 490,661.40, 737,960.40 and 439,485.60

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Solution

The fourth proportional to 490,661.40, 737,960.40 and 439,485.60 is: 660,991.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,661.40 : 737,960.40 = 439,485.60 : x
  2. Step 2: Convert to fraction form
    490,661.40/737,960.40 = 439,485.60/x
  3. Step 3: Cross multiply
    490,661.40x = 737,960.40 × 439,485.60
  4. Step 4: Simplify right side
    490,661.40x = 324,322,969,170.24
  5. Step 5: Solve for x
    x = 324,322,969,170.24/490,661.40
  6. Step 6: Final answer
    x = 660,991.41

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1.5x scale

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.