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Finding the Fourth Proportional to 666,330.40, 999,625.20 and 193,031.20

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Solution

The fourth proportional to 666,330.40, 999,625.20 and 193,031.20 is: 289,584.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,330.40 : 999,625.20 = 193,031.20 : x
  2. Step 2: Convert to fraction form
    666,330.40/999,625.20 = 193,031.20/x
  3. Step 3: Cross multiply
    666,330.40x = 999,625.20 × 193,031.20
  4. Step 4: Simplify right side
    666,330.40x = 192,958,851,906.24
  5. Step 5: Solve for x
    x = 192,958,851,906.24/666,330.40
  6. Step 6: Final answer
    x = 289,584.34

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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.