Finding the Fourth Proportional to 398,318.78, 549,672.99 and 217,032.20
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Solution
The fourth proportional to 398,318.78, 549,672.99 and 217,032.20 is: 299,500.66
Step by Step Solution
- Step 1: Write the proportion equation
398,318.78 : 549,672.99 = 217,032.20 : x - Step 2: Convert to fraction form
398,318.78/549,672.99 = 217,032.20/x - Step 3: Cross multiply
398,318.78x = 549,672.99 × 217,032.20 - Step 4: Simplify right side
398,318.78x = 119,296,736,799.32 - Step 5: Solve for x
x = 119,296,736,799.32/398,318.78 - Step 6: Final answer
x = 299,500.66
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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.