Finding the Fourth Proportional to 1,438,503.56, 1,985,139.12 and 785,135.60
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Solution
The fourth proportional to 1,438,503.56, 1,985,139.12 and 785,135.60 is: 1,083,489.42
Step by Step Solution
- Step 1: Write the proportion equation
1,438,503.56 : 1,985,139.12 = 785,135.60 : x - Step 2: Convert to fraction form
1,438,503.56/1,985,139.12 = 785,135.60/x - Step 3: Cross multiply
1,438,503.56x = 1,985,139.12 × 785,135.60 - Step 4: Simplify right side
1,438,503.56x = 1,558,603,394,064.67 - Step 5: Solve for x
x = 1,558,603,394,064.67/1,438,503.56 - Step 6: Final answer
x = 1,083,489.42
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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.