Finding the Fourth Proportional to 1,078,966,805.20, 1,618,450,207.80 and 806,869,013.20
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Solution
The fourth proportional to 1,078,966,805.20, 1,618,450,207.80 and 806,869,013.20 is: 1,210,303,519.80
Step by Step Solution
- Step 1: Write the proportion equation
1,078,966,805.20 : 1,618,450,207.80 = 806,869,013.20 : x - Step 2: Convert to fraction form
1,078,966,805.20/1,618,450,207.80 = 806,869,013.20/x - Step 3: Cross multiply
1,078,966,805.20x = 1,618,450,207.80 × 806,869,013.20 - Step 4: Simplify right side
1,078,966,805.20x = 1,305,877,322,080,921,088 - Step 5: Solve for x
x = 1,305,877,322,080,921,088/1,078,966,805.20 - Step 6: Final answer
x = 1,210,303,519.80
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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.