Finding the Fourth Proportional to 1,121,972,520.96, 1,548,475,885.44 and 645,653,105.28
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Solution
The fourth proportional to 1,121,972,520.96, 1,548,475,885.44 and 645,653,105.28 is: 891,089,795.17
Step by Step Solution
- Step 1: Write the proportion equation
1,121,972,520.96 : 1,548,475,885.44 = 645,653,105.28 : x - Step 2: Convert to fraction form
1,121,972,520.96/1,548,475,885.44 = 645,653,105.28/x - Step 3: Cross multiply
1,121,972,520.96x = 1,548,475,885.44 × 645,653,105.28 - Step 4: Simplify right side
1,121,972,520.96x = 999,778,263,885,533,568 - Step 5: Solve for x
x = 999,778,263,885,533,568/1,121,972,520.96 - Step 6: Final answer
x = 891,089,795.17
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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.