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Finding the Fourth Proportional to 677,885.09, 935,564.45 and 391,404.56

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Solution

The fourth proportional to 677,885.09, 935,564.45 and 391,404.56 is: 540,186.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,885.09 : 935,564.45 = 391,404.56 : x
  2. Step 2: Convert to fraction form
    677,885.09/935,564.45 = 391,404.56/x
  3. Step 3: Cross multiply
    677,885.09x = 935,564.45 × 391,404.56
  4. Step 4: Simplify right side
    677,885.09x = 366,184,185,269.05
  5. Step 5: Solve for x
    x = 366,184,185,269.05/677,885.09
  6. Step 6: Final answer
    x = 540,186.23

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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.