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Finding the Fourth Proportional to 490,664.40, 735,996.60 and 485,998.80

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Solution

The fourth proportional to 490,664.40, 735,996.60 and 485,998.80 is: 728,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,664.40 : 735,996.60 = 485,998.80 : x
  2. Step 2: Convert to fraction form
    490,664.40/735,996.60 = 485,998.80/x
  3. Step 3: Cross multiply
    490,664.40x = 735,996.60 × 485,998.80
  4. Step 4: Simplify right side
    490,664.40x = 357,693,464,404.08
  5. Step 5: Solve for x
    x = 357,693,464,404.08/490,664.40
  6. Step 6: Final answer
    x = 728,998.20

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Similar ratio
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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.