Finding the Fourth Proportional to 289,688,390.98, 399,780,492.18 and 165,952,982.92
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Solution
The fourth proportional to 289,688,390.98, 399,780,492.18 and 165,952,982.92 is: 229,021,138.77
Step by Step Solution
- Step 1: Write the proportion equation
289,688,390.98 : 399,780,492.18 = 165,952,982.92 : x - Step 2: Convert to fraction form
289,688,390.98/399,780,492.18 = 165,952,982.92/x - Step 3: Cross multiply
289,688,390.98x = 399,780,492.18 × 165,952,982.92 - Step 4: Simplify right side
289,688,390.98x = 66,344,765,190,496,728 - Step 5: Solve for x
x = 66,344,765,190,496,728/289,688,390.98 - Step 6: Final answer
x = 229,021,138.77
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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.