Finding the Fourth Proportional to 312,701.19, 431,369.08 and 197,786.28
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Solution
The fourth proportional to 312,701.19, 431,369.08 and 197,786.28 is: 272,844.77
Step by Step Solution
- Step 1: Write the proportion equation
312,701.19 : 431,369.08 = 197,786.28 : x - Step 2: Convert to fraction form
312,701.19/431,369.08 = 197,786.28/x - Step 3: Cross multiply
312,701.19x = 431,369.08 × 197,786.28 - Step 4: Simplify right side
312,701.19x = 85,318,885,640.22 - Step 5: Solve for x
x = 85,318,885,640.22/312,701.19 - Step 6: Final answer
x = 272,844.77
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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.