Finding the Fourth Proportional to 579,427.70, 869,141.55 and 486,115.70
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Solution
The fourth proportional to 579,427.70, 869,141.55 and 486,115.70 is: 729,173.55
Step by Step Solution
- Step 1: Write the proportion equation
579,427.70 : 869,141.55 = 486,115.70 : x - Step 2: Convert to fraction form
579,427.70/869,141.55 = 486,115.70/x - Step 3: Cross multiply
579,427.70x = 869,141.55 × 486,115.70 - Step 4: Simplify right side
579,427.70x = 422,503,352,977.34 - Step 5: Solve for x
x = 422,503,352,977.34/579,427.70 - Step 6: Final answer
x = 729,173.55
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Double scale
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Similar ratio
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1.5x scale
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.