Finding the Fourth Proportional to 1,312,951,691.85, 1,811,867,917.35 and 710,122,988.12
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Solution
The fourth proportional to 1,312,951,691.85, 1,811,867,917.35 and 710,122,988.12 is: 979,966,793.54
Step by Step Solution
- Step 1: Write the proportion equation
1,312,951,691.85 : 1,811,867,917.35 = 710,122,988.12 : x - Step 2: Convert to fraction form
1,312,951,691.85/1,811,867,917.35 = 710,122,988.12/x - Step 3: Cross multiply
1,312,951,691.85x = 1,811,867,917.35 × 710,122,988.12 - Step 4: Simplify right side
1,312,951,691.85x = 1,286,649,059,538,283,776 - Step 5: Solve for x
x = 1,286,649,059,538,283,776/1,312,951,691.85 - Step 6: Final answer
x = 979,966,793.54
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.