Finding the Fourth Proportional to 1,078,176.20, 1,618,430.70 and 679,267.40
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Solution
The fourth proportional to 1,078,176.20, 1,618,430.70 and 679,267.40 is: 1,019,635.95
Step by Step Solution
- Step 1: Write the proportion equation
1,078,176.20 : 1,618,430.70 = 679,267.40 : x - Step 2: Convert to fraction form
1,078,176.20/1,618,430.70 = 679,267.40/x - Step 3: Cross multiply
1,078,176.20x = 1,618,430.70 × 679,267.40 - Step 4: Simplify right side
1,078,176.20x = 1,099,347,213,669.18 - Step 5: Solve for x
x = 1,099,347,213,669.18/1,078,176.20 - Step 6: Final answer
x = 1,019,635.95
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.