Finding the Fourth Proportional to 681,217,811.70, 1,021,826,717.55 and 394,563,347.70
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Solution
The fourth proportional to 681,217,811.70, 1,021,826,717.55 and 394,563,347.70 is: 591,845,021.55
Step by Step Solution
- Step 1: Write the proportion equation
681,217,811.70 : 1,021,826,717.55 = 394,563,347.70 : x - Step 2: Convert to fraction form
681,217,811.70/1,021,826,717.55 = 394,563,347.70/x - Step 3: Cross multiply
681,217,811.70x = 1,021,826,717.55 × 394,563,347.70 - Step 4: Simplify right side
681,217,811.70x = 403,175,370,445,830,336 - Step 5: Solve for x
x = 403,175,370,445,830,336/681,217,811.70 - Step 6: Final answer
x = 591,845,021.55
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Double scale
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Similar ratio
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.