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Finding the Fourth Proportional to 665,667.06, 919,378.02 and 447,496.80

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Solution

The fourth proportional to 665,667.06, 919,378.02 and 447,496.80 is: 618,054.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,667.06 : 919,378.02 = 447,496.80 : x
  2. Step 2: Convert to fraction form
    665,667.06/919,378.02 = 447,496.80/x
  3. Step 3: Cross multiply
    665,667.06x = 919,378.02 × 447,496.80
  4. Step 4: Simplify right side
    665,667.06x = 411,418,721,940.34
  5. Step 5: Solve for x
    x = 411,418,721,940.34/665,667.06
  6. Step 6: Final answer
    x = 618,054.80

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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.