Home / 815,129.60-1,222,694.40-628,505.60

Finding the Fourth Proportional to 815,129.60, 1,222,694.40 and 628,505.60

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Solution

The fourth proportional to 815,129.60, 1,222,694.40 and 628,505.60 is: 942,758.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,129.60 : 1,222,694.40 = 628,505.60 : x
  2. Step 2: Convert to fraction form
    815,129.60/1,222,694.40 = 628,505.60/x
  3. Step 3: Cross multiply
    815,129.60x = 1,222,694.40 × 628,505.60
  4. Step 4: Simplify right side
    815,129.60x = 768,470,277,488.64
  5. Step 5: Solve for x
    x = 768,470,277,488.64/815,129.60
  6. Step 6: Final answer
    x = 942,758.40

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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.