Finding the Fourth Proportional to 312,479.18, 431,219.12 and 169,235.94
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Solution
The fourth proportional to 312,479.18, 431,219.12 and 169,235.94 is: 233,544.43
Step by Step Solution
- Step 1: Write the proportion equation
312,479.18 : 431,219.12 = 169,235.94 : x - Step 2: Convert to fraction form
312,479.18/431,219.12 = 169,235.94/x - Step 3: Cross multiply
312,479.18x = 431,219.12 × 169,235.94 - Step 4: Simplify right side
312,479.18x = 72,977,772,272.99 - Step 5: Solve for x
x = 72,977,772,272.99/312,479.18 - Step 6: Final answer
x = 233,544.43
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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.