Finding the Fourth Proportional to 1,611,706,586.40, 2,417,559,879.60 and 521,299,879.20
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Solution
The fourth proportional to 1,611,706,586.40, 2,417,559,879.60 and 521,299,879.20 is: 781,949,818.80
Step by Step Solution
- Step 1: Write the proportion equation
1,611,706,586.40 : 2,417,559,879.60 = 521,299,879.20 : x - Step 2: Convert to fraction form
1,611,706,586.40/2,417,559,879.60 = 521,299,879.20/x - Step 3: Cross multiply
1,611,706,586.40x = 2,417,559,879.60 × 521,299,879.20 - Step 4: Simplify right side
1,611,706,586.40x = 1,260,273,673,194,246,400 - Step 5: Solve for x
x = 1,260,273,673,194,246,400/1,611,706,586.40 - Step 6: Final answer
x = 781,949,818.80
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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.