Finding the Fourth Proportional to 644,241.21, 888,909.70 and 389,586.93
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Solution
The fourth proportional to 644,241.21, 888,909.70 and 389,586.93 is: 537,543.39
Step by Step Solution
- Step 1: Write the proportion equation
644,241.21 : 888,909.70 = 389,586.93 : x - Step 2: Convert to fraction form
644,241.21/888,909.70 = 389,586.93/x - Step 3: Cross multiply
644,241.21x = 888,909.70 × 389,586.93 - Step 4: Simplify right side
644,241.21x = 346,307,601,070.22 - Step 5: Solve for x
x = 346,307,601,070.22/644,241.21 - Step 6: Final answer
x = 537,543.39
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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.