Finding the Fourth Proportional to 1,391,628.65, 1,920,414.96 and 818,705.66
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Solution
The fourth proportional to 1,391,628.65, 1,920,414.96 and 818,705.66 is: 1,129,794.64
Step by Step Solution
- Step 1: Write the proportion equation
1,391,628.65 : 1,920,414.96 = 818,705.66 : x - Step 2: Convert to fraction form
1,391,628.65/1,920,414.96 = 818,705.66/x - Step 3: Cross multiply
1,391,628.65x = 1,920,414.96 × 818,705.66 - Step 4: Simplify right side
1,391,628.65x = 1,572,254,587,698.60 - Step 5: Solve for x
x = 1,572,254,587,698.60/1,391,628.65 - Step 6: Final answer
x = 1,129,794.64
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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.