Home / 814,485.60-1,221,728.40-513,991.80

Finding the Fourth Proportional to 814,485.60, 1,221,728.40 and 513,991.80

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Solution

The fourth proportional to 814,485.60, 1,221,728.40 and 513,991.80 is: 770,987.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,485.60 : 1,221,728.40 = 513,991.80 : x
  2. Step 2: Convert to fraction form
    814,485.60/1,221,728.40 = 513,991.80/x
  3. Step 3: Cross multiply
    814,485.60x = 1,221,728.40 × 513,991.80
  4. Step 4: Simplify right side
    814,485.60x = 627,958,379,427.12
  5. Step 5: Solve for x
    x = 627,958,379,427.12/814,485.60
  6. Step 6: Final answer
    x = 770,987.70

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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.