Finding the Fourth Proportional to 874,891,206.40, 1,312,336,809.60 and 808,378,412.80
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Solution
The fourth proportional to 874,891,206.40, 1,312,336,809.60 and 808,378,412.80 is: 1,212,567,619.20
Step by Step Solution
- Step 1: Write the proportion equation
874,891,206.40 : 1,312,336,809.60 = 808,378,412.80 : x - Step 2: Convert to fraction form
874,891,206.40/1,312,336,809.60 = 808,378,412.80/x - Step 3: Cross multiply
874,891,206.40x = 1,312,336,809.60 × 808,378,412.80 - Step 4: Simplify right side
874,891,206.40x = 1,060,864,747,203,463,680 - Step 5: Solve for x
x = 1,060,864,747,203,463,680/874,891,206.40 - Step 6: Final answer
x = 1,212,567,619.20
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Double scale
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Similar ratio
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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.