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Finding the Fourth Proportional to 647,778.38, 893,935.41 and 361,317.02

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Solution

The fourth proportional to 647,778.38, 893,935.41 and 361,317.02 is: 498,618.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,778.38 : 893,935.41 = 361,317.02 : x
  2. Step 2: Convert to fraction form
    647,778.38/893,935.41 = 361,317.02/x
  3. Step 3: Cross multiply
    647,778.38x = 893,935.41 × 361,317.02
  4. Step 4: Simplify right side
    647,778.38x = 322,994,078,413.68
  5. Step 5: Solve for x
    x = 322,994,078,413.68/647,778.38
  6. Step 6: Final answer
    x = 498,618.18

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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.