Finding the Fourth Proportional to 1,391,701.70, 1,920,515.87 and 818,778.78
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Solution
The fourth proportional to 1,391,701.70, 1,920,515.87 and 818,778.78 is: 1,129,895.61
Step by Step Solution
- Step 1: Write the proportion equation
1,391,701.70 : 1,920,515.87 = 818,778.78 : x - Step 2: Convert to fraction form
1,391,701.70/1,920,515.87 = 818,778.78/x - Step 3: Cross multiply
1,391,701.70x = 1,920,515.87 × 818,778.78 - Step 4: Simplify right side
1,391,701.70x = 1,572,477,643,056.19 - Step 5: Solve for x
x = 1,572,477,643,056.19/1,391,701.70 - Step 6: Final answer
x = 1,129,895.61
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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.