Finding the Fourth Proportional to 992,412,326.40, 1,488,618,489.60 and 977,106,825.60
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Solution
The fourth proportional to 992,412,326.40, 1,488,618,489.60 and 977,106,825.60 is: 1,465,660,238.40
Step by Step Solution
- Step 1: Write the proportion equation
992,412,326.40 : 1,488,618,489.60 = 977,106,825.60 : x - Step 2: Convert to fraction form
992,412,326.40/1,488,618,489.60 = 977,106,825.60/x - Step 3: Cross multiply
992,412,326.40x = 1,488,618,489.60 × 977,106,825.60 - Step 4: Simplify right side
992,412,326.40x = 1,454,539,286,902,522,624 - Step 5: Solve for x
x = 1,454,539,286,902,522,624/992,412,326.40 - Step 6: Final answer
x = 1,465,660,238.40
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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.