Finding the Fourth Proportional to 1,073,128,518.70, 1,609,692,778.05 and 840,676,225.30
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Solution
The fourth proportional to 1,073,128,518.70, 1,609,692,778.05 and 840,676,225.30 is: 1,261,014,337.95
Step by Step Solution
- Step 1: Write the proportion equation
1,073,128,518.70 : 1,609,692,778.05 = 840,676,225.30 : x - Step 2: Convert to fraction form
1,073,128,518.70/1,609,692,778.05 = 840,676,225.30/x - Step 3: Cross multiply
1,073,128,518.70x = 1,609,692,778.05 × 840,676,225.30 - Step 4: Simplify right side
1,073,128,518.70x = 1,353,230,448,543,744,512 - Step 5: Solve for x
x = 1,353,230,448,543,744,512/1,073,128,518.70 - Step 6: Final answer
x = 1,261,014,337.95
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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.