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Finding the Fourth Proportional to 388,413.48, 536,020.74 and 218,653.80

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Solution

The fourth proportional to 388,413.48, 536,020.74 and 218,653.80 is: 301,747.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,413.48 : 536,020.74 = 218,653.80 : x
  2. Step 2: Convert to fraction form
    388,413.48/536,020.74 = 218,653.80/x
  3. Step 3: Cross multiply
    388,413.48x = 536,020.74 × 218,653.80
  4. Step 4: Simplify right side
    388,413.48x = 117,202,971,679.81
  5. Step 5: Solve for x
    x = 117,202,971,679.81/388,413.48
  6. Step 6: Final answer
    x = 301,747.95

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.