Finding the Fourth Proportional to 1,212,880,881.63, 1,673,775,619.29 and 655,963,928.67
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Solution
The fourth proportional to 1,212,880,881.63, 1,673,775,619.29 and 655,963,928.67 is: 905,230,222.99
Step by Step Solution
- Step 1: Write the proportion equation
1,212,880,881.63 : 1,673,775,619.29 = 655,963,928.67 : x - Step 2: Convert to fraction form
1,212,880,881.63/1,673,775,619.29 = 655,963,928.67/x - Step 3: Cross multiply
1,212,880,881.63x = 1,673,775,619.29 × 655,963,928.67 - Step 4: Simplify right side
1,212,880,881.63x = 1,097,936,430,941,530,496 - Step 5: Solve for x
x = 1,097,936,430,941,530,496/1,212,880,881.63 - Step 6: Final answer
x = 905,230,222.99
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.