Finding the Fourth Proportional to 1,114,915,276.40, 1,538,147,622.16 and 638,350,950.18
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Solution
The fourth proportional to 1,114,915,276.40, 1,538,147,622.16 and 638,350,950.18 is: 880,674,986.62
Step by Step Solution
- Step 1: Write the proportion equation
1,114,915,276.40 : 1,538,147,622.16 = 638,350,950.18 : x - Step 2: Convert to fraction form
1,114,915,276.40/1,538,147,622.16 = 638,350,950.18/x - Step 3: Cross multiply
1,114,915,276.40x = 1,538,147,622.16 × 638,350,950.18 - Step 4: Simplify right side
1,114,915,276.40x = 981,877,996,122,943,616 - Step 5: Solve for x
x = 981,877,996,122,943,616/1,114,915,276.40 - Step 6: Final answer
x = 880,674,986.62
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1.5x scale
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.