Finding the Fourth Proportional to 1,108,972,130.20, 1,663,458,195.30 and 291,167,099.80
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Solution
The fourth proportional to 1,108,972,130.20, 1,663,458,195.30 and 291,167,099.80 is: 436,750,649.70
Step by Step Solution
- Step 1: Write the proportion equation
1,108,972,130.20 : 1,663,458,195.30 = 291,167,099.80 : x - Step 2: Convert to fraction form
1,108,972,130.20/1,663,458,195.30 = 291,167,099.80/x - Step 3: Cross multiply
1,108,972,130.20x = 1,663,458,195.30 × 291,167,099.80 - Step 4: Simplify right side
1,108,972,130.20x = 484,344,298,364,043,008 - Step 5: Solve for x
x = 484,344,298,364,043,008/1,108,972,130.20 - Step 6: Final answer
x = 436,750,649.70
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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.