Home / 399,413.94-551,195.61-218,131.20

Finding the Fourth Proportional to 399,413.94, 551,195.61 and 218,131.20

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Solution

The fourth proportional to 399,413.94, 551,195.61 and 218,131.20 is: 301,023.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,413.94 : 551,195.61 = 218,131.20 : x
  2. Step 2: Convert to fraction form
    399,413.94/551,195.61 = 218,131.20/x
  3. Step 3: Cross multiply
    399,413.94x = 551,195.61 × 218,131.20
  4. Step 4: Simplify right side
    399,413.94x = 120,232,959,844.03
  5. Step 5: Solve for x
    x = 120,232,959,844.03/399,413.94
  6. Step 6: Final answer
    x = 301,023.44

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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.