Finding the Fourth Proportional to 206,478.62, 309,508.80 and 139,925.48
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Solution
The fourth proportional to 206,478.62, 309,508.80 and 139,925.48 is: 209,746.49
Step by Step Solution
- Step 1: Write the proportion equation
206,478.62 : 309,508.80 = 139,925.48 : x - Step 2: Convert to fraction form
206,478.62/309,508.80 = 139,925.48/x - Step 3: Cross multiply
206,478.62x = 309,508.80 × 139,925.48 - Step 4: Simplify right side
206,478.62x = 43,308,165,331.96 - Step 5: Solve for x
x = 43,308,165,331.96/206,478.62 - Step 6: Final answer
x = 209,746.49
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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.