Finding the Fourth Proportional to 1,018,816,382.28, 1,405,971,368.79 and 578,807,378.76
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Solution
The fourth proportional to 1,018,816,382.28, 1,405,971,368.79 and 578,807,378.76 is: 798,756,887.63
Step by Step Solution
- Step 1: Write the proportion equation
1,018,816,382.28 : 1,405,971,368.79 = 578,807,378.76 : x - Step 2: Convert to fraction form
1,018,816,382.28/1,405,971,368.79 = 578,807,378.76/x - Step 3: Cross multiply
1,018,816,382.28x = 1,405,971,368.79 × 578,807,378.76 - Step 4: Simplify right side
1,018,816,382.28x = 813,786,602,580,949,120 - Step 5: Solve for x
x = 813,786,602,580,949,120/1,018,816,382.28 - Step 6: Final answer
x = 798,756,887.63
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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.