Finding the Fourth Proportional to 398,397.21, 549,788.26 and 217,109.19
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Solution
The fourth proportional to 398,397.21, 549,788.26 and 217,109.19 is: 299,610.74
Step by Step Solution
- Step 1: Write the proportion equation
398,397.21 : 549,788.26 = 217,109.19 : x - Step 2: Convert to fraction form
398,397.21/549,788.26 = 217,109.19/x - Step 3: Cross multiply
398,397.21x = 549,788.26 × 217,109.19 - Step 4: Simplify right side
398,397.21x = 119,364,081,087.28 - Step 5: Solve for x
x = 119,364,081,087.28/398,397.21 - Step 6: Final answer
x = 299,610.74
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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.