Finding the Fourth Proportional to 917,993,207.70, 1,376,989,811.55 and 661,626,069.30
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Solution
The fourth proportional to 917,993,207.70, 1,376,989,811.55 and 661,626,069.30 is: 992,439,103.95
Step by Step Solution
- Step 1: Write the proportion equation
917,993,207.70 : 1,376,989,811.55 = 661,626,069.30 : x - Step 2: Convert to fraction form
917,993,207.70/1,376,989,811.55 = 661,626,069.30/x - Step 3: Cross multiply
917,993,207.70x = 1,376,989,811.55 × 661,626,069.30 - Step 4: Simplify right side
917,993,207.70x = 911,052,356,481,974,144 - Step 5: Solve for x
x = 911,052,356,481,974,144/917,993,207.70 - Step 6: Final answer
x = 992,439,103.95
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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.