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Finding the Fourth Proportional to 663,325, 915,413.22 and 376,893.60

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Solution

The fourth proportional to 663,325, 915,413.22 and 376,893.60 is: 520,127.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,325 : 915,413.22 = 376,893.60 : x
  2. Step 2: Convert to fraction form
    663,325/915,413.22 = 376,893.60/x
  3. Step 3: Cross multiply
    663,325x = 915,413.22 × 376,893.60
  4. Step 4: Simplify right side
    663,325x = 345,013,383,973.39
  5. Step 5: Solve for x
    x = 345,013,383,973.39/663,325
  6. Step 6: Final answer
    x = 520,127.21

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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.