Finding the Fourth Proportional to 1,239.05, 1,858.89 and 623.09
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Solution
The fourth proportional to 1,239.05, 1,858.89 and 623.09 is: 934.79
Step by Step Solution
- Step 1: Write the proportion equation
1,239.05 : 1,858.89 = 623.09 : x - Step 2: Convert to fraction form
1,239.05/1,858.89 = 623.09/x - Step 3: Cross multiply
1,239.05x = 1,858.89 × 623.09 - Step 4: Simplify right side
1,239.05x = 1,158,255.77 - Step 5: Solve for x
x = 1,158,255.77/1,239.05 - Step 6: Final answer
x = 934.79
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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.