Finding the Fourth Proportional to 1,293,347,207.20, 1,940,020,810.80 and 638,611,895.20
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Solution
The fourth proportional to 1,293,347,207.20, 1,940,020,810.80 and 638,611,895.20 is: 957,917,842.80
Step by Step Solution
- Step 1: Write the proportion equation
1,293,347,207.20 : 1,940,020,810.80 = 638,611,895.20 : x - Step 2: Convert to fraction form
1,293,347,207.20/1,940,020,810.80 = 638,611,895.20/x - Step 3: Cross multiply
1,293,347,207.20x = 1,940,020,810.80 × 638,611,895.20 - Step 4: Simplify right side
1,293,347,207.20x = 1,238,920,366,712,428,800 - Step 5: Solve for x
x = 1,238,920,366,712,428,800/1,293,347,207.20 - Step 6: Final answer
x = 957,917,842.80
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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.