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Finding the Fourth Proportional to 677,999.04, 935,807.88 and 391,685.28

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Solution

The fourth proportional to 677,999.04, 935,807.88 and 391,685.28 is: 540,623.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,999.04 : 935,807.88 = 391,685.28 : x
  2. Step 2: Convert to fraction form
    677,999.04/935,807.88 = 391,685.28/x
  3. Step 3: Cross multiply
    677,999.04x = 935,807.88 × 391,685.28
  4. Step 4: Simplify right side
    677,999.04x = 366,542,171,504.01
  5. Step 5: Solve for x
    x = 366,542,171,504.01/677,999.04
  6. Step 6: Final answer
    x = 540,623.44

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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.