Finding the Fourth Proportional to 381.70, 526.26 and 307.81
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Solution
The fourth proportional to 381.70, 526.26 and 307.81 is: 424.39
Step by Step Solution
- Step 1: Write the proportion equation
381.70 : 526.26 = 307.81 : x - Step 2: Convert to fraction form
381.70/526.26 = 307.81/x - Step 3: Cross multiply
381.70x = 526.26 × 307.81 - Step 4: Simplify right side
381.70x = 161,988.09 - Step 5: Solve for x
x = 161,988.09/381.70 - Step 6: Final answer
x = 424.39
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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.