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Finding the Fourth Proportional to 554,611.40, 831,914.40 and 217,413.80

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Solution

The fourth proportional to 554,611.40, 831,914.40 and 217,413.80 is: 326,119.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,611.40 : 831,914.40 = 217,413.80 : x
  2. Step 2: Convert to fraction form
    554,611.40/831,914.40 = 217,413.80/x
  3. Step 3: Cross multiply
    554,611.40x = 831,914.40 × 217,413.80
  4. Step 4: Simplify right side
    554,611.40x = 180,869,670,978.72
  5. Step 5: Solve for x
    x = 180,869,670,978.72/554,611.40
  6. Step 6: Final answer
    x = 326,119.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.