Finding the Fourth Proportional to 1,242,121.17, 1,861,852.95 and 642,478.62
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Solution
The fourth proportional to 1,242,121.17, 1,861,852.95 and 642,478.62 is: 963,030.61
Step by Step Solution
- Step 1: Write the proportion equation
1,242,121.17 : 1,861,852.95 = 642,478.62 : x - Step 2: Convert to fraction form
1,242,121.17/1,861,852.95 = 642,478.62/x - Step 3: Cross multiply
1,242,121.17x = 1,861,852.95 × 642,478.62 - Step 4: Simplify right side
1,242,121.17x = 1,196,200,713,958.93 - Step 5: Solve for x
x = 1,196,200,713,958.93/1,242,121.17 - Step 6: Final answer
x = 963,030.61
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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.