Finding the Fourth Proportional to 2,138,613.12, 2,951,173.20 and 1,220,805.76
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Solution
The fourth proportional to 2,138,613.12, 2,951,173.20 and 1,220,805.76 is: 1,684,647.50
Step by Step Solution
- Step 1: Write the proportion equation
2,138,613.12 : 2,951,173.20 = 1,220,805.76 : x - Step 2: Convert to fraction form
2,138,613.12/2,951,173.20 = 1,220,805.76/x - Step 3: Cross multiply
2,138,613.12x = 2,951,173.20 × 1,220,805.76 - Step 4: Simplify right side
2,138,613.12x = 3,602,809,241,317.63 - Step 5: Solve for x
x = 3,602,809,241,317.63/2,138,613.12 - Step 6: Final answer
x = 1,684,647.50
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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.