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Finding the Fourth Proportional to 519,412.40, 779,264.40 and 253,181.60

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Solution

The fourth proportional to 519,412.40, 779,264.40 and 253,181.60 is: 379,843.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,412.40 : 779,264.40 = 253,181.60 : x
  2. Step 2: Convert to fraction form
    519,412.40/779,264.40 = 253,181.60/x
  3. Step 3: Cross multiply
    519,412.40x = 779,264.40 × 253,181.60
  4. Step 4: Simplify right side
    519,412.40x = 197,295,407,615.04
  5. Step 5: Solve for x
    x = 197,295,407,615.04/519,412.40
  6. Step 6: Final answer
    x = 379,843.47

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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.