Home / 685,104.30-1,025,688.15-419,383.80

Finding the Fourth Proportional to 685,104.30, 1,025,688.15 and 419,383.80

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Solution

The fourth proportional to 685,104.30, 1,025,688.15 and 419,383.80 is: 627,870.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,104.30 : 1,025,688.15 = 419,383.80 : x
  2. Step 2: Convert to fraction form
    685,104.30/1,025,688.15 = 419,383.80/x
  3. Step 3: Cross multiply
    685,104.30x = 1,025,688.15 × 419,383.80
  4. Step 4: Simplify right side
    685,104.30x = 430,156,993,961.97
  5. Step 5: Solve for x
    x = 430,156,993,961.97/685,104.30
  6. Step 6: Final answer
    x = 627,870.81

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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.