Finding the Fourth Proportional to 398,415.75, 549,813.74 and 219,567.75
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Solution
The fourth proportional to 398,415.75, 549,813.74 and 219,567.75 is: 303,003.50
Step by Step Solution
- Step 1: Write the proportion equation
398,415.75 : 549,813.74 = 219,567.75 : x - Step 2: Convert to fraction form
398,415.75/549,813.74 = 219,567.75/x - Step 3: Cross multiply
398,415.75x = 549,813.74 × 219,567.75 - Step 4: Simplify right side
398,415.75x = 120,721,364,713.05 - Step 5: Solve for x
x = 120,721,364,713.05/398,415.75 - Step 6: Final answer
x = 303,003.50
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1.5x scale
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.