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Finding the Fourth Proportional to 666,412.80, 999,619.20 and 193,113.60

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Solution

The fourth proportional to 666,412.80, 999,619.20 and 193,113.60 is: 289,670.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,412.80 : 999,619.20 = 193,113.60 : x
  2. Step 2: Convert to fraction form
    666,412.80/999,619.20 = 193,113.60/x
  3. Step 3: Cross multiply
    666,412.80x = 999,619.20 × 193,113.60
  4. Step 4: Simplify right side
    666,412.80x = 193,040,062,341.12
  5. Step 5: Solve for x
    x = 193,040,062,341.12/666,412.80
  6. Step 6: Final answer
    x = 289,670.40

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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.