Finding the Fourth Proportional to 398,427.72, 549,814.21 and 217,135.75
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Solution
The fourth proportional to 398,427.72, 549,814.21 and 217,135.75 is: 299,638.58
Step by Step Solution
- Step 1: Write the proportion equation
398,427.72 : 549,814.21 = 217,135.75 : x - Step 2: Convert to fraction form
398,427.72/549,814.21 = 217,135.75/x - Step 3: Cross multiply
398,427.72x = 549,814.21 × 217,135.75 - Step 4: Simplify right side
398,427.72x = 119,384,317,014.26 - Step 5: Solve for x
x = 119,384,317,014.26/398,427.72 - Step 6: Final answer
x = 299,638.58
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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.