Finding the Fourth Proportional to 686,116.12, 1,029,124.74 and 212,789.18
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Solution
The fourth proportional to 686,116.12, 1,029,124.74 and 212,789.18 is: 319,168.43
Step by Step Solution
- Step 1: Write the proportion equation
686,116.12 : 1,029,124.74 = 212,789.18 : x - Step 2: Convert to fraction form
686,116.12/1,029,124.74 = 212,789.18/x - Step 3: Cross multiply
686,116.12x = 1,029,124.74 × 212,789.18 - Step 4: Simplify right side
686,116.12x = 218,986,607,124.26 - Step 5: Solve for x
x = 218,986,607,124.26/686,116.12 - Step 6: Final answer
x = 319,168.43
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.