Finding the Fourth Proportional to 1,247,511,935.60, 1,869,252,364.20 and 786,625,305.20
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Solution
The fourth proportional to 1,247,511,935.60, 1,869,252,364.20 and 786,625,305.20 is: 1,178,667,048.81
Step by Step Solution
- Step 1: Write the proportion equation
1,247,511,935.60 : 1,869,252,364.20 = 786,625,305.20 : x - Step 2: Convert to fraction form
1,247,511,935.60/1,869,252,364.20 = 786,625,305.20/x - Step 3: Cross multiply
1,247,511,935.60x = 1,869,252,364.20 × 786,625,305.20 - Step 4: Simplify right side
1,247,511,935.60x = 1,470,401,211,484,646,656 - Step 5: Solve for x
x = 1,470,401,211,484,646,656/1,247,511,935.60 - Step 6: Final answer
x = 1,178,667,048.81
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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.