Home / 685,220.80-1,025,862.90-419,500.30

Finding the Fourth Proportional to 685,220.80, 1,025,862.90 and 419,500.30

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Solution

The fourth proportional to 685,220.80, 1,025,862.90 and 419,500.30 is: 628,045.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,220.80 : 1,025,862.90 = 419,500.30 : x
  2. Step 2: Convert to fraction form
    685,220.80/1,025,862.90 = 419,500.30/x
  3. Step 3: Cross multiply
    685,220.80x = 1,025,862.90 × 419,500.30
  4. Step 4: Simplify right side
    685,220.80x = 430,349,794,308.87
  5. Step 5: Solve for x
    x = 430,349,794,308.87/685,220.80
  6. Step 6: Final answer
    x = 628,045.43

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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.