Finding the Fourth Proportional to 1,287,420.84, 1,776,229.74 and 743,484.78
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Solution
The fourth proportional to 1,287,420.84, 1,776,229.74 and 743,484.78 is: 1,025,771.63
Step by Step Solution
- Step 1: Write the proportion equation
1,287,420.84 : 1,776,229.74 = 743,484.78 : x - Step 2: Convert to fraction form
1,287,420.84/1,776,229.74 = 743,484.78/x - Step 3: Cross multiply
1,287,420.84x = 1,776,229.74 × 743,484.78 - Step 4: Simplify right side
1,287,420.84x = 1,320,599,777,473.36 - Step 5: Solve for x
x = 1,320,599,777,473.36/1,287,420.84 - Step 6: Final answer
x = 1,025,771.63
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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.