Finding the Fourth Proportional to 1,128,478.19, 1,557,299.91 and 645,053.81
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Solution
The fourth proportional to 1,128,478.19, 1,557,299.91 and 645,053.81 is: 890,174.26
Step by Step Solution
- Step 1: Write the proportion equation
1,128,478.19 : 1,557,299.91 = 645,053.81 : x - Step 2: Convert to fraction form
1,128,478.19/1,557,299.91 = 645,053.81/x - Step 3: Cross multiply
1,128,478.19x = 1,557,299.91 × 645,053.81 - Step 4: Simplify right side
1,128,478.19x = 1,004,542,232,471.66 - Step 5: Solve for x
x = 1,004,542,232,471.66/1,128,478.19 - Step 6: Final answer
x = 890,174.26
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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.