Finding the Fourth Proportional to 1,128,612,763.35, 1,557,489,221.70 and 626,821,456.05
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Solution
The fourth proportional to 1,128,612,763.35, 1,557,489,221.70 and 626,821,456.05 is: 865,015,613.35
Step by Step Solution
- Step 1: Write the proportion equation
1,128,612,763.35 : 1,557,489,221.70 = 626,821,456.05 : x - Step 2: Convert to fraction form
1,128,612,763.35/1,557,489,221.70 = 626,821,456.05/x - Step 3: Cross multiply
1,128,612,763.35x = 1,557,489,221.70 × 626,821,456.05 - Step 4: Simplify right side
1,128,612,763.35x = 976,267,661,728,175,232 - Step 5: Solve for x
x = 976,267,661,728,175,232/1,128,612,763.35 - Step 6: Final answer
x = 865,015,613.35
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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.