Finding the Fourth Proportional to 639,089,764.20, 958,634,646.30 and 509,949,601.20
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Solution
The fourth proportional to 639,089,764.20, 958,634,646.30 and 509,949,601.20 is: 764,924,401.80
Step by Step Solution
- Step 1: Write the proportion equation
639,089,764.20 : 958,634,646.30 = 509,949,601.20 : x - Step 2: Convert to fraction form
639,089,764.20/958,634,646.30 = 509,949,601.20/x - Step 3: Cross multiply
639,089,764.20x = 958,634,646.30 × 509,949,601.20 - Step 4: Simplify right side
639,089,764.20x = 488,855,355,577,188,032 - Step 5: Solve for x
x = 488,855,355,577,188,032/639,089,764.20 - Step 6: Final answer
x = 764,924,401.80
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Double scale
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Similar ratio
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1.5x scale
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.