Finding the Fourth Proportional to 839,809,643.20, 1,259,714,464.80 and 788,791,307.20
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Solution
The fourth proportional to 839,809,643.20, 1,259,714,464.80 and 788,791,307.20 is: 1,183,186,960.80
Step by Step Solution
- Step 1: Write the proportion equation
839,809,643.20 : 1,259,714,464.80 = 788,791,307.20 : x - Step 2: Convert to fraction form
839,809,643.20/1,259,714,464.80 = 788,791,307.20/x - Step 3: Cross multiply
839,809,643.20x = 1,259,714,464.80 × 788,791,307.20 - Step 4: Simplify right side
839,809,643.20x = 993,651,819,388,340,352 - Step 5: Solve for x
x = 993,651,819,388,340,352/839,809,643.20 - Step 6: Final answer
x = 1,183,186,960.80
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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.