Home / 685,220.30-1,025,862.15-419,499.80

Finding the Fourth Proportional to 685,220.30, 1,025,862.15 and 419,499.80

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Solution

The fourth proportional to 685,220.30, 1,025,862.15 and 419,499.80 is: 628,044.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,220.30 : 1,025,862.15 = 419,499.80 : x
  2. Step 2: Convert to fraction form
    685,220.30/1,025,862.15 = 419,499.80/x
  3. Step 3: Cross multiply
    685,220.30x = 1,025,862.15 × 419,499.80
  4. Step 4: Simplify right side
    685,220.30x = 430,348,966,752.57
  5. Step 5: Solve for x
    x = 430,348,966,752.57/685,220.30
  6. Step 6: Final answer
    x = 628,044.68

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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.