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Finding the Fourth Proportional to 490,321.60, 735,336.60 and 190,629.70

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Solution

The fourth proportional to 490,321.60, 735,336.60 and 190,629.70 is: 285,887.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,321.60 : 735,336.60 = 190,629.70 : x
  2. Step 2: Convert to fraction form
    490,321.60/735,336.60 = 190,629.70/x
  3. Step 3: Cross multiply
    490,321.60x = 735,336.60 × 190,629.70
  4. Step 4: Simplify right side
    490,321.60x = 140,176,995,457.02
  5. Step 5: Solve for x
    x = 140,176,995,457.02/490,321.60
  6. Step 6: Final answer
    x = 285,887.87

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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.