Finding the Fourth Proportional to 1,008,021,402.70, 1,512,032,104.05 and 317,998,408.30
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Solution
The fourth proportional to 1,008,021,402.70, 1,512,032,104.05 and 317,998,408.30 is: 476,997,612.45
Step by Step Solution
- Step 1: Write the proportion equation
1,008,021,402.70 : 1,512,032,104.05 = 317,998,408.30 : x - Step 2: Convert to fraction form
1,008,021,402.70/1,512,032,104.05 = 317,998,408.30/x - Step 3: Cross multiply
1,008,021,402.70x = 1,512,032,104.05 × 317,998,408.30 - Step 4: Simplify right side
1,008,021,402.70x = 480,823,802,386,400,000 - Step 5: Solve for x
x = 480,823,802,386,400,000/1,008,021,402.70 - Step 6: Final answer
x = 476,997,612.45
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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.