Finding the Fourth Proportional to 1,440,213,128.49, 1,987,813,851.09 and 875,578,032.48
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Solution
The fourth proportional to 1,440,213,128.49, 1,987,813,851.09 and 875,578,032.48 is: 1,208,492,067.07
Step by Step Solution
- Step 1: Write the proportion equation
1,440,213,128.49 : 1,987,813,851.09 = 875,578,032.48 : x - Step 2: Convert to fraction form
1,440,213,128.49/1,987,813,851.09 = 875,578,032.48/x - Step 3: Cross multiply
1,440,213,128.49x = 1,987,813,851.09 × 875,578,032.48 - Step 4: Simplify right side
1,440,213,128.49x = 1,740,486,140,673,873,920 - Step 5: Solve for x
x = 1,740,486,140,673,873,920/1,440,213,128.49 - Step 6: Final answer
x = 1,208,492,067.07
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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.