Finding the Fourth Proportional to 398,403.21, 549,796.53 and 217,115.19
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Solution
The fourth proportional to 398,403.21, 549,796.53 and 217,115.19 is: 299,619.02
Step by Step Solution
- Step 1: Write the proportion equation
398,403.21 : 549,796.53 = 217,115.19 : x - Step 2: Convert to fraction form
398,403.21/549,796.53 = 217,115.19/x - Step 3: Cross multiply
398,403.21x = 549,796.53 × 217,115.19 - Step 4: Simplify right side
398,403.21x = 119,369,178,072.29 - Step 5: Solve for x
x = 119,369,178,072.29/398,403.21 - Step 6: Final answer
x = 299,619.02
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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.