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Finding the Fourth Proportional to 193,999.80, 290,999.70 and 190,889.40

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Solution

The fourth proportional to 193,999.80, 290,999.70 and 190,889.40 is: 286,334.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,999.80 : 290,999.70 = 190,889.40 : x
  2. Step 2: Convert to fraction form
    193,999.80/290,999.70 = 190,889.40/x
  3. Step 3: Cross multiply
    193,999.80x = 290,999.70 × 190,889.40
  4. Step 4: Simplify right side
    193,999.80x = 55,548,758,133.18
  5. Step 5: Solve for x
    x = 55,548,758,133.18/193,999.80
  6. Step 6: Final answer
    x = 286,334.10

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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.