Finding the Fourth Proportional to 1,279,639,157.11, 1,765,908,566.89 and 715,133,460.42
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Solution
The fourth proportional to 1,279,639,157.11, 1,765,908,566.89 and 715,133,460.42 is: 986,887,824.75
Step by Step Solution
- Step 1: Write the proportion equation
1,279,639,157.11 : 1,765,908,566.89 = 715,133,460.42 : x - Step 2: Convert to fraction form
1,279,639,157.11/1,765,908,566.89 = 715,133,460.42/x - Step 3: Cross multiply
1,279,639,157.11x = 1,765,908,566.89 × 715,133,460.42 - Step 4: Simplify right side
1,279,639,157.11x = 1,262,860,304,223,580,928 - Step 5: Solve for x
x = 1,262,860,304,223,580,928/1,279,639,157.11 - Step 6: Final answer
x = 986,887,824.75
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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.