Finding the Fourth Proportional to 3,476,891,980.40, 5,215,370,253.68 and 989,752,821.14
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Solution
The fourth proportional to 3,476,891,980.40, 5,215,370,253.68 and 989,752,821.14 is: 1,484,638,421.60
Step by Step Solution
- Step 1: Write the proportion equation
3,476,891,980.40 : 5,215,370,253.68 = 989,752,821.14 : x - Step 2: Convert to fraction form
3,476,891,980.40/5,215,370,253.68 = 989,752,821.14/x - Step 3: Cross multiply
3,476,891,980.40x = 5,215,370,253.68 × 989,752,821.14 - Step 4: Simplify right side
3,476,891,980.40x = 5,161,927,421,869,417,472 - Step 5: Solve for x
x = 5,161,927,421,869,417,472/3,476,891,980.40 - Step 6: Final answer
x = 1,484,638,421.60
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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.