Finding the Fourth Proportional to 935,278,059.47, 1,290,631,208.40 and 511,890,858.06
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Solution
The fourth proportional to 935,278,059.47, 1,290,631,208.40 and 511,890,858.06 is: 706,380,642.65
Step by Step Solution
- Step 1: Write the proportion equation
935,278,059.47 : 1,290,631,208.40 = 511,890,858.06 : x - Step 2: Convert to fraction form
935,278,059.47/1,290,631,208.40 = 511,890,858.06/x - Step 3: Cross multiply
935,278,059.47x = 1,290,631,208.40 × 511,890,858.06 - Step 4: Simplify right side
935,278,059.47x = 660,662,316,706,890,752 - Step 5: Solve for x
x = 660,662,316,706,890,752/935,278,059.47 - Step 6: Final answer
x = 706,380,642.65
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Double scale
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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.