Finding the Fourth Proportional to 212,428.80, 318,643.20 and 178,603.20
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Solution
The fourth proportional to 212,428.80, 318,643.20 and 178,603.20 is: 267,904.80
Step by Step Solution
- Step 1: Write the proportion equation
212,428.80 : 318,643.20 = 178,603.20 : x - Step 2: Convert to fraction form
212,428.80/318,643.20 = 178,603.20/x - Step 3: Cross multiply
212,428.80x = 318,643.20 × 178,603.20 - Step 4: Simplify right side
212,428.80x = 56,910,695,178.24 - Step 5: Solve for x
x = 56,910,695,178.24/212,428.80 - Step 6: Final answer
x = 267,904.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.