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Finding the Fourth Proportional to 639,089,771.70, 958,634,657.55 and 509,949,608.70

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Solution

The fourth proportional to 639,089,771.70, 958,634,657.55 and 509,949,608.70 is: 764,924,413.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,089,771.70 : 958,634,657.55 = 509,949,608.70 : x
  2. Step 2: Convert to fraction form
    639,089,771.70/958,634,657.55 = 509,949,608.70/x
  3. Step 3: Cross multiply
    639,089,771.70x = 958,634,657.55 × 509,949,608.70
  4. Step 4: Simplify right side
    639,089,771.70x = 488,855,368,503,880,960
  5. Step 5: Solve for x
    x = 488,855,368,503,880,960/639,089,771.70
  6. Step 6: Final answer
    x = 764,924,413.05

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Double scale
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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.