Finding the Fourth Proportional to 1,245,220,967.84, 1,718,416,369.70 and 709,364,691.12
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Solution
The fourth proportional to 1,245,220,967.84, 1,718,416,369.70 and 709,364,691.12 is: 978,929,787.40
Step by Step Solution
- Step 1: Write the proportion equation
1,245,220,967.84 : 1,718,416,369.70 = 709,364,691.12 : x - Step 2: Convert to fraction form
1,245,220,967.84/1,718,416,369.70 = 709,364,691.12/x - Step 3: Cross multiply
1,245,220,967.84x = 1,718,416,369.70 × 709,364,691.12 - Step 4: Simplify right side
1,245,220,967.84x = 1,218,983,897,311,206,400 - Step 5: Solve for x
x = 1,218,983,897,311,206,400/1,245,220,967.84 - Step 6: Final answer
x = 978,929,787.40
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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.