Finding the Fourth Proportional to 1,128,390.49, 1,557,284.30 and 644,861.17
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Solution
The fourth proportional to 1,128,390.49, 1,557,284.30 and 644,861.17 is: 889,968.66
Step by Step Solution
- Step 1: Write the proportion equation
1,128,390.49 : 1,557,284.30 = 644,861.17 : x - Step 2: Convert to fraction form
1,128,390.49/1,557,284.30 = 644,861.17/x - Step 3: Cross multiply
1,128,390.49x = 1,557,284.30 × 644,861.17 - Step 4: Simplify right side
1,128,390.49x = 1,004,232,175,720.63 - Step 5: Solve for x
x = 1,004,232,175,720.63/1,128,390.49 - Step 6: Final answer
x = 889,968.66
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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.