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Finding the Fourth Proportional to 678,661, 936,591.06 and 376,874.44

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Solution

The fourth proportional to 678,661, 936,591.06 and 376,874.44 is: 520,108.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,661 : 936,591.06 = 376,874.44 : x
  2. Step 2: Convert to fraction form
    678,661/936,591.06 = 376,874.44/x
  3. Step 3: Cross multiply
    678,661x = 936,591.06 × 376,874.44
  4. Step 4: Simplify right side
    678,661x = 352,977,231,246.51
  5. Step 5: Solve for x
    x = 352,977,231,246.51/678,661
  6. Step 6: Final answer
    x = 520,108.32

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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.