Finding the Fourth Proportional to 312,312.64, 430,991.60 and 169,072.68
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Solution
The fourth proportional to 312,312.64, 430,991.60 and 169,072.68 is: 233,320.38
Step by Step Solution
- Step 1: Write the proportion equation
312,312.64 : 430,991.60 = 169,072.68 : x - Step 2: Convert to fraction form
312,312.64/430,991.60 = 169,072.68/x - Step 3: Cross multiply
312,312.64x = 430,991.60 × 169,072.68 - Step 4: Simplify right side
312,312.64x = 72,868,904,869.49 - Step 5: Solve for x
x = 72,868,904,869.49/312,312.64 - Step 6: Final answer
x = 233,320.38
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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.