Finding the Fourth Proportional to 1,128,394.96, 1,557,290.51 and 644,865.67
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Solution
The fourth proportional to 1,128,394.96, 1,557,290.51 and 644,865.67 is: 889,974.90
Step by Step Solution
- Step 1: Write the proportion equation
1,128,394.96 : 1,557,290.51 = 644,865.67 : x - Step 2: Convert to fraction form
1,128,394.96/1,557,290.51 = 644,865.67/x - Step 3: Cross multiply
1,128,394.96x = 1,557,290.51 × 644,865.67 - Step 4: Simplify right side
1,128,394.96x = 1,004,243,188,115.79 - Step 5: Solve for x
x = 1,004,243,188,115.79/1,128,394.96 - Step 6: Final answer
x = 889,974.90
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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.