Finding the Fourth Proportional to 428,437.89, 591,221.50 and 247,138.99
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Solution
The fourth proportional to 428,437.89, 591,221.50 and 247,138.99 is: 341,038.66
Step by Step Solution
- Step 1: Write the proportion equation
428,437.89 : 591,221.50 = 247,138.99 : x - Step 2: Convert to fraction form
428,437.89/591,221.50 = 247,138.99/x - Step 3: Cross multiply
428,437.89x = 591,221.50 × 247,138.99 - Step 4: Simplify right side
428,437.89x = 146,113,884,376.29 - Step 5: Solve for x
x = 146,113,884,376.29/428,437.89 - Step 6: Final answer
x = 341,038.66
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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.