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Finding the Fourth Proportional to 519,346.40, 779,165.40 and 253,115.60

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Solution

The fourth proportional to 519,346.40, 779,165.40 and 253,115.60 is: 379,744.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,346.40 : 779,165.40 = 253,115.60 : x
  2. Step 2: Convert to fraction form
    519,346.40/779,165.40 = 253,115.60/x
  3. Step 3: Cross multiply
    519,346.40x = 779,165.40 × 253,115.60
  4. Step 4: Simplify right side
    519,346.40x = 197,218,917,720.24
  5. Step 5: Solve for x
    x = 197,218,917,720.24/519,346.40
  6. Step 6: Final answer
    x = 379,744.46

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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.