Home / 919,979.39-1,269,571.46-512,072.45

Finding the Fourth Proportional to 919,979.39, 1,269,571.46 and 512,072.45

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Solution

The fourth proportional to 919,979.39, 1,269,571.46 and 512,072.45 is: 706,659.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,979.39 : 1,269,571.46 = 512,072.45 : x
  2. Step 2: Convert to fraction form
    919,979.39/1,269,571.46 = 512,072.45/x
  3. Step 3: Cross multiply
    919,979.39x = 1,269,571.46 × 512,072.45
  4. Step 4: Simplify right side
    919,979.39x = 650,112,559,064.06
  5. Step 5: Solve for x
    x = 650,112,559,064.06/919,979.39
  6. Step 6: Final answer
    x = 706,659.92

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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.