Finding the Fourth Proportional to 478,389,616.70, 670,198,959.70 and 478,389,616.70
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Solution
The fourth proportional to 478,389,616.70, 670,198,959.70 and 478,389,616.70 is: 670,198,959.70
Step by Step Solution
- Step 1: Write the proportion equation
478,389,616.70 : 670,198,959.70 = 478,389,616.70 : x - Step 2: Convert to fraction form
478,389,616.70/670,198,959.70 = 478,389,616.70/x - Step 3: Cross multiply
478,389,616.70x = 670,198,959.70 × 478,389,616.70 - Step 4: Simplify right side
478,389,616.70x = 320,616,223,443,621,760 - Step 5: Solve for x
x = 320,616,223,443,621,760/478,389,616.70 - Step 6: Final answer
x = 670,198,959.70
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Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.