Finding the Fourth Proportional to 643,566,529.10, 965,349,793.65 and 212,745,025.10
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Solution
The fourth proportional to 643,566,529.10, 965,349,793.65 and 212,745,025.10 is: 319,117,537.65
Step by Step Solution
- Step 1: Write the proportion equation
643,566,529.10 : 965,349,793.65 = 212,745,025.10 : x - Step 2: Convert to fraction form
643,566,529.10/965,349,793.65 = 212,745,025.10/x - Step 3: Cross multiply
643,566,529.10x = 965,349,793.65 × 212,745,025.10 - Step 4: Simplify right side
643,566,529.10x = 205,373,366,080,349,056 - Step 5: Solve for x
x = 205,373,366,080,349,056/643,566,529.10 - Step 6: Final answer
x = 319,117,537.65
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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.