Finding the Fourth Proportional to 3,178,841.11, 4,386,823.55 and 1,728,526.15
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Solution
The fourth proportional to 3,178,841.11, 4,386,823.55 and 1,728,526.15 is: 2,385,378.49
Step by Step Solution
- Step 1: Write the proportion equation
3,178,841.11 : 4,386,823.55 = 1,728,526.15 : x - Step 2: Convert to fraction form
3,178,841.11/4,386,823.55 = 1,728,526.15/x - Step 3: Cross multiply
3,178,841.11x = 4,386,823.55 × 1,728,526.15 - Step 4: Simplify right side
3,178,841.11x = 7,582,739,221,610.83 - Step 5: Solve for x
x = 7,582,739,221,610.83/3,178,841.11 - Step 6: Final answer
x = 2,385,378.49
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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.