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Finding the Fourth Proportional to 677,469.58, 934,840.65 and 391,081.93

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Solution

The fourth proportional to 677,469.58, 934,840.65 and 391,081.93 is: 539,654.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,469.58 : 934,840.65 = 391,081.93 : x
  2. Step 2: Convert to fraction form
    677,469.58/934,840.65 = 391,081.93/x
  3. Step 3: Cross multiply
    677,469.58x = 934,840.65 × 391,081.93
  4. Step 4: Simplify right side
    677,469.58x = 365,599,285,644.46
  5. Step 5: Solve for x
    x = 365,599,285,644.46/677,469.58
  6. Step 6: Final answer
    x = 539,654.17

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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.