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Finding the Fourth Proportional to 677,661.68, 935,016.14 and 405,626.15

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Solution

The fourth proportional to 677,661.68, 935,016.14 and 405,626.15 is: 559,670.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,661.68 : 935,016.14 = 405,626.15 : x
  2. Step 2: Convert to fraction form
    677,661.68/935,016.14 = 405,626.15/x
  3. Step 3: Cross multiply
    677,661.68x = 935,016.14 × 405,626.15
  4. Step 4: Simplify right side
    677,661.68x = 379,266,995,027.93
  5. Step 5: Solve for x
    x = 379,266,995,027.93/677,661.68
  6. Step 6: Final answer
    x = 559,670.12

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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.