Finding the Fourth Proportional to 926,638.11, 1,389,981.47 and 319,419.99
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Solution
The fourth proportional to 926,638.11, 1,389,981.47 and 319,419.99 is: 479,138.36
Step by Step Solution
- Step 1: Write the proportion equation
926,638.11 : 1,389,981.47 = 319,419.99 : x - Step 2: Convert to fraction form
926,638.11/1,389,981.47 = 319,419.99/x - Step 3: Cross multiply
926,638.11x = 1,389,981.47 × 319,419.99 - Step 4: Simplify right side
926,638.11x = 443,987,865,650.49 - Step 5: Solve for x
x = 443,987,865,650.49/926,638.11 - Step 6: Final answer
x = 479,138.36
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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.