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Finding the Fourth Proportional to 519,740.40, 779,610.60 and 393,769.20

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Solution

The fourth proportional to 519,740.40, 779,610.60 and 393,769.20 is: 590,653.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,740.40 : 779,610.60 = 393,769.20 : x
  2. Step 2: Convert to fraction form
    519,740.40/779,610.60 = 393,769.20/x
  3. Step 3: Cross multiply
    519,740.40x = 779,610.60 × 393,769.20
  4. Step 4: Simplify right side
    519,740.40x = 306,986,642,273.52
  5. Step 5: Solve for x
    x = 306,986,642,273.52/519,740.40
  6. Step 6: Final answer
    x = 590,653.80

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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.