Finding the Fourth Proportional to 312,779.70, 469,515.15 and 172,811.70
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Solution
The fourth proportional to 312,779.70, 469,515.15 and 172,811.70 is: 259,408.50
Step by Step Solution
- Step 1: Write the proportion equation
312,779.70 : 469,515.15 = 172,811.70 : x - Step 2: Convert to fraction form
312,779.70/469,515.15 = 172,811.70/x - Step 3: Cross multiply
312,779.70x = 469,515.15 × 172,811.70 - Step 4: Simplify right side
312,779.70x = 81,137,711,247.26 - Step 5: Solve for x
x = 81,137,711,247.26/312,779.70 - Step 6: Final answer
x = 259,408.50
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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.