Finding the Fourth Proportional to 885,700,674.30, 1,328,551,011.45 and 821,203,419.90
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Solution
The fourth proportional to 885,700,674.30, 1,328,551,011.45 and 821,203,419.90 is: 1,231,805,129.85
Step by Step Solution
- Step 1: Write the proportion equation
885,700,674.30 : 1,328,551,011.45 = 821,203,419.90 : x - Step 2: Convert to fraction form
885,700,674.30/1,328,551,011.45 = 821,203,419.90/x - Step 3: Cross multiply
885,700,674.30x = 1,328,551,011.45 × 821,203,419.90 - Step 4: Simplify right side
885,700,674.30x = 1,091,010,634,114,344,064 - Step 5: Solve for x
x = 1,091,010,634,114,344,064/885,700,674.30 - Step 6: Final answer
x = 1,231,805,129.85
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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.