Finding the Fourth Proportional to 1,391,671.09, 1,920,628.36 and 810,864.03
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Solution
The fourth proportional to 1,391,671.09, 1,920,628.36 and 810,864.03 is: 1,119,063.60
Step by Step Solution
- Step 1: Write the proportion equation
1,391,671.09 : 1,920,628.36 = 810,864.03 : x - Step 2: Convert to fraction form
1,391,671.09/1,920,628.36 = 810,864.03/x - Step 3: Cross multiply
1,391,671.09x = 1,920,628.36 × 810,864.03 - Step 4: Simplify right side
1,391,671.09x = 1,557,368,460,337.83 - Step 5: Solve for x
x = 1,557,368,460,337.83/1,391,671.09 - Step 6: Final answer
x = 1,119,063.60
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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.