Home / 789,939,643.38-1,089,703,413.66-488,428,573.11

Finding the Fourth Proportional to 789,939,643.38, 1,089,703,413.66 and 488,428,573.11

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Solution

The fourth proportional to 789,939,643.38, 1,089,703,413.66 and 488,428,573.11 is: 673,775,886.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    789,939,643.38 : 1,089,703,413.66 = 488,428,573.11 : x
  2. Step 2: Convert to fraction form
    789,939,643.38/1,089,703,413.66 = 488,428,573.11/x
  3. Step 3: Cross multiply
    789,939,643.38x = 1,089,703,413.66 × 488,428,573.11
  4. Step 4: Simplify right side
    789,939,643.38x = 532,242,283,447,049,920
  5. Step 5: Solve for x
    x = 532,242,283,447,049,920/789,939,643.38
  6. Step 6: Final answer
    x = 673,775,886.43

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Double scale
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1.5x scale

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.