Home / 685,219.80-1,025,861.40-419,499.30

Finding the Fourth Proportional to 685,219.80, 1,025,861.40 and 419,499.30

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Solution

The fourth proportional to 685,219.80, 1,025,861.40 and 419,499.30 is: 628,043.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,219.80 : 1,025,861.40 = 419,499.30 : x
  2. Step 2: Convert to fraction form
    685,219.80/1,025,861.40 = 419,499.30/x
  3. Step 3: Cross multiply
    685,219.80x = 1,025,861.40 × 419,499.30
  4. Step 4: Simplify right side
    685,219.80x = 430,348,139,197.02
  5. Step 5: Solve for x
    x = 430,348,139,197.02/685,219.80
  6. Step 6: Final answer
    x = 628,043.93

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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.