Finding the Fourth Proportional to 812,702.82, 1,121,538.30 and 490,350.62
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Solution
The fourth proportional to 812,702.82, 1,121,538.30 and 490,350.62 is: 676,688.93
Step by Step Solution
- Step 1: Write the proportion equation
812,702.82 : 1,121,538.30 = 490,350.62 : x - Step 2: Convert to fraction form
812,702.82/1,121,538.30 = 490,350.62/x - Step 3: Cross multiply
812,702.82x = 1,121,538.30 × 490,350.62 - Step 4: Simplify right side
812,702.82x = 549,947,000,758.75 - Step 5: Solve for x
x = 549,947,000,758.75/812,702.82 - Step 6: Final answer
x = 676,688.93
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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.