Finding the Fourth Proportional to 420,091,456.68, 630,236,163.78 and 143,745,679.62
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Solution
The fourth proportional to 420,091,456.68, 630,236,163.78 and 143,745,679.62 is: 215,652,387.70
Step by Step Solution
- Step 1: Write the proportion equation
420,091,456.68 : 630,236,163.78 = 143,745,679.62 : x - Step 2: Convert to fraction form
420,091,456.68/630,236,163.78 = 143,745,679.62/x - Step 3: Cross multiply
420,091,456.68x = 630,236,163.78 × 143,745,679.62 - Step 4: Simplify right side
420,091,456.68x = 90,593,725,683,657,728 - Step 5: Solve for x
x = 90,593,725,683,657,728/420,091,456.68 - Step 6: Final answer
x = 215,652,387.70
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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.