Finding the Fourth Proportional to 579,423.70, 869,135.55 and 486,111.70
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Solution
The fourth proportional to 579,423.70, 869,135.55 and 486,111.70 is: 729,167.55
Step by Step Solution
- Step 1: Write the proportion equation
579,423.70 : 869,135.55 = 486,111.70 : x - Step 2: Convert to fraction form
579,423.70/869,135.55 = 486,111.70/x - Step 3: Cross multiply
579,423.70x = 869,135.55 × 486,111.70 - Step 4: Simplify right side
579,423.70x = 422,496,959,740.94 - Step 5: Solve for x
x = 422,496,959,740.94/579,423.70 - Step 6: Final answer
x = 729,167.55
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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.