Finding the Fourth Proportional to 1,245,008,297.79, 1,718,107,279.74 and 680,492,852.42
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Solution
The fourth proportional to 1,245,008,297.79, 1,718,107,279.74 and 680,492,852.42 is: 939,077,856.45
Step by Step Solution
- Step 1: Write the proportion equation
1,245,008,297.79 : 1,718,107,279.74 = 680,492,852.42 : x - Step 2: Convert to fraction form
1,245,008,297.79/1,718,107,279.74 = 680,492,852.42/x - Step 3: Cross multiply
1,245,008,297.79x = 1,718,107,279.74 × 680,492,852.42 - Step 4: Simplify right side
1,245,008,297.79x = 1,169,159,723,550,436,864 - Step 5: Solve for x
x = 1,169,159,723,550,436,864/1,245,008,297.79 - Step 6: Final answer
x = 939,077,856.45
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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.