Finding the Fourth Proportional to 921,311,965.80, 1,381,967,948.70 and 299,525,995.80
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Solution
The fourth proportional to 921,311,965.80, 1,381,967,948.70 and 299,525,995.80 is: 449,288,993.70
Step by Step Solution
- Step 1: Write the proportion equation
921,311,965.80 : 1,381,967,948.70 = 299,525,995.80 : x - Step 2: Convert to fraction form
921,311,965.80/1,381,967,948.70 = 299,525,995.80/x - Step 3: Cross multiply
921,311,965.80x = 1,381,967,948.70 × 299,525,995.80 - Step 4: Simplify right side
921,311,965.80x = 413,935,325,998,050,816 - Step 5: Solve for x
x = 413,935,325,998,050,816/921,311,965.80 - Step 6: Final answer
x = 449,288,993.70
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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.