Finding the Fourth Proportional to 1,128,612,756.94, 1,557,489,212.87 and 626,821,449.71
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Solution
The fourth proportional to 1,128,612,756.94, 1,557,489,212.87 and 626,821,449.71 is: 865,015,604.61
Step by Step Solution
- Step 1: Write the proportion equation
1,128,612,756.94 : 1,557,489,212.87 = 626,821,449.71 : x - Step 2: Convert to fraction form
1,128,612,756.94/1,557,489,212.87 = 626,821,449.71/x - Step 3: Cross multiply
1,128,612,756.94x = 1,557,489,212.87 × 626,821,449.71 - Step 4: Simplify right side
1,128,612,756.94x = 976,267,646,307,938,688 - Step 5: Solve for x
x = 976,267,646,307,938,688/1,128,612,756.94 - Step 6: Final answer
x = 865,015,604.61
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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.