Finding the Fourth Proportional to 1,327,720,339.05, 1,991,580,508.58 and 638,972,803.05
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Solution
The fourth proportional to 1,327,720,339.05, 1,991,580,508.58 and 638,972,803.05 is: 958,459,204.58
Step by Step Solution
- Step 1: Write the proportion equation
1,327,720,339.05 : 1,991,580,508.58 = 638,972,803.05 : x - Step 2: Convert to fraction form
1,327,720,339.05/1,991,580,508.58 = 638,972,803.05/x - Step 3: Cross multiply
1,327,720,339.05x = 1,991,580,508.58 × 638,972,803.05 - Step 4: Simplify right side
1,327,720,339.05x = 1,272,565,780,063,912,192 - Step 5: Solve for x
x = 1,272,565,780,063,912,192/1,327,720,339.05 - Step 6: Final answer
x = 958,459,204.58
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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.