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Finding the Fourth Proportional to 666,370.86, 919,710.18 and 394,589.64

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Solution

The fourth proportional to 666,370.86, 919,710.18 and 394,589.64 is: 544,603.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,370.86 : 919,710.18 = 394,589.64 : x
  2. Step 2: Convert to fraction form
    666,370.86/919,710.18 = 394,589.64/x
  3. Step 3: Cross multiply
    666,370.86x = 919,710.18 × 394,589.64
  4. Step 4: Simplify right side
    666,370.86x = 362,908,108,830.54
  5. Step 5: Solve for x
    x = 362,908,108,830.54/666,370.86
  6. Step 6: Final answer
    x = 544,603.81

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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.