Finding the Fourth Proportional to 229,290.75, 316,421.24 and 128,688.75
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Solution
The fourth proportional to 229,290.75, 316,421.24 and 128,688.75 is: 177,590.48
Step by Step Solution
- Step 1: Write the proportion equation
229,290.75 : 316,421.24 = 128,688.75 : x - Step 2: Convert to fraction form
229,290.75/316,421.24 = 128,688.75/x - Step 3: Cross multiply
229,290.75x = 316,421.24 × 128,688.75 - Step 4: Simplify right side
229,290.75x = 40,719,853,849.05 - Step 5: Solve for x
x = 40,719,853,849.05/229,290.75 - Step 6: Final answer
x = 177,590.48
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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.