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Finding the Fourth Proportional to 666,418.80, 999,628.20 and 193,119.60

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Solution

The fourth proportional to 666,418.80, 999,628.20 and 193,119.60 is: 289,679.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,418.80 : 999,628.20 = 193,119.60 : x
  2. Step 2: Convert to fraction form
    666,418.80/999,628.20 = 193,119.60/x
  3. Step 3: Cross multiply
    666,418.80x = 999,628.20 × 193,119.60
  4. Step 4: Simplify right side
    666,418.80x = 193,047,798,132.72
  5. Step 5: Solve for x
    x = 193,047,798,132.72/666,418.80
  6. Step 6: Final answer
    x = 289,679.40

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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.