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Finding the Fourth Proportional to 515,991.36, 712,112.78 and 286,592.88

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Solution

The fourth proportional to 515,991.36, 712,112.78 and 286,592.88 is: 395,523.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,991.36 : 712,112.78 = 286,592.88 : x
  2. Step 2: Convert to fraction form
    515,991.36/712,112.78 = 286,592.88/x
  3. Step 3: Cross multiply
    515,991.36x = 712,112.78 × 286,592.88
  4. Step 4: Simplify right side
    515,991.36x = 204,086,452,505.01
  5. Step 5: Solve for x
    x = 204,086,452,505.01/515,991.36
  6. Step 6: Final answer
    x = 395,523.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.