Home / 885,786.60-1,328,679.90-412,519.80

Finding the Fourth Proportional to 885,786.60, 1,328,679.90 and 412,519.80

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Solution

The fourth proportional to 885,786.60, 1,328,679.90 and 412,519.80 is: 618,779.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,786.60 : 1,328,679.90 = 412,519.80 : x
  2. Step 2: Convert to fraction form
    885,786.60/1,328,679.90 = 412,519.80/x
  3. Step 3: Cross multiply
    885,786.60x = 1,328,679.90 × 412,519.80
  4. Step 4: Simplify right side
    885,786.60x = 548,106,766,612.02
  5. Step 5: Solve for x
    x = 548,106,766,612.02/885,786.60
  6. Step 6: Final answer
    x = 618,779.70

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Double scale
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Similar ratio
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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.