Home / 638,127.20-957,190.80-319,262.60

Finding the Fourth Proportional to 638,127.20, 957,190.80 and 319,262.60

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Solution

The fourth proportional to 638,127.20, 957,190.80 and 319,262.60 is: 478,893.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,127.20 : 957,190.80 = 319,262.60 : x
  2. Step 2: Convert to fraction form
    638,127.20/957,190.80 = 319,262.60/x
  3. Step 3: Cross multiply
    638,127.20x = 957,190.80 × 319,262.60
  4. Step 4: Simplify right side
    638,127.20x = 305,595,223,504.08
  5. Step 5: Solve for x
    x = 305,595,223,504.08/638,127.20
  6. Step 6: Final answer
    x = 478,893.90

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Half scale
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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.