Finding the Fourth Proportional to 1,008,021,409.70, 1,512,032,114.56 and 317,998,415.30
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Solution
The fourth proportional to 1,008,021,409.70, 1,512,032,114.56 and 317,998,415.30 is: 476,997,622.95
Step by Step Solution
- Step 1: Write the proportion equation
1,008,021,409.70 : 1,512,032,114.56 = 317,998,415.30 : x - Step 2: Convert to fraction form
1,008,021,409.70/1,512,032,114.56 = 317,998,415.30/x - Step 3: Cross multiply
1,008,021,409.70x = 1,512,032,114.56 × 317,998,415.30 - Step 4: Simplify right side
1,008,021,409.70x = 480,823,816,312,788,032 - Step 5: Solve for x
x = 480,823,816,312,788,032/1,008,021,409.70 - Step 6: Final answer
x = 476,997,622.95
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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.