Finding the Fourth Proportional to 398,489.12, 549,898.87 and 217,197.15
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Solution
The fourth proportional to 398,489.12, 549,898.87 and 217,197.15 is: 299,723.28
Step by Step Solution
- Step 1: Write the proportion equation
398,489.12 : 549,898.87 = 217,197.15 : x - Step 2: Convert to fraction form
398,489.12/549,898.87 = 217,197.15/x - Step 3: Cross multiply
398,489.12x = 549,898.87 × 217,197.15 - Step 4: Simplify right side
398,489.12x = 119,436,467,352.22 - Step 5: Solve for x
x = 119,436,467,352.22/398,489.12 - Step 6: Final answer
x = 299,723.28
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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.