Home / 685,276.80-1,025,946.90-419,556.30

Finding the Fourth Proportional to 685,276.80, 1,025,946.90 and 419,556.30

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Solution

The fourth proportional to 685,276.80, 1,025,946.90 and 419,556.30 is: 628,129.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,276.80 : 1,025,946.90 = 419,556.30 : x
  2. Step 2: Convert to fraction form
    685,276.80/1,025,946.90 = 419,556.30/x
  3. Step 3: Cross multiply
    685,276.80x = 1,025,946.90 × 419,556.30
  4. Step 4: Simplify right side
    685,276.80x = 430,442,485,360.47
  5. Step 5: Solve for x
    x = 430,442,485,360.47/685,276.80
  6. Step 6: Final answer
    x = 628,129.37

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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.