Home / 831,003.80-1,246,505.70-515,816.60

Finding the Fourth Proportional to 831,003.80, 1,246,505.70 and 515,816.60

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Solution

The fourth proportional to 831,003.80, 1,246,505.70 and 515,816.60 is: 773,724.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,003.80 : 1,246,505.70 = 515,816.60 : x
  2. Step 2: Convert to fraction form
    831,003.80/1,246,505.70 = 515,816.60/x
  3. Step 3: Cross multiply
    831,003.80x = 1,246,505.70 × 515,816.60
  4. Step 4: Simplify right side
    831,003.80x = 642,968,332,054.62
  5. Step 5: Solve for x
    x = 642,968,332,054.62/831,003.80
  6. Step 6: Final answer
    x = 773,724.90

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Double scale
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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.