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Finding the Fourth Proportional to 666,248.40, 919,398.44 and 379,713.14

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Solution

The fourth proportional to 666,248.40, 919,398.44 and 379,713.14 is: 523,990.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,248.40 : 919,398.44 = 379,713.14 : x
  2. Step 2: Convert to fraction form
    666,248.40/919,398.44 = 379,713.14/x
  3. Step 3: Cross multiply
    666,248.40x = 919,398.44 × 379,713.14
  4. Step 4: Simplify right side
    666,248.40x = 349,107,662,067.94
  5. Step 5: Solve for x
    x = 349,107,662,067.94/666,248.40
  6. Step 6: Final answer
    x = 523,990.24

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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.