Finding the Fourth Proportional to 709,786.18, 979,467.87 and 387,434.00
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Solution
The fourth proportional to 709,786.18, 979,467.87 and 387,434.00 is: 534,638.69
Step by Step Solution
- Step 1: Write the proportion equation
709,786.18 : 979,467.87 = 387,434.00 : x - Step 2: Convert to fraction form
709,786.18/979,467.87 = 387,434.00/x - Step 3: Cross multiply
709,786.18x = 979,467.87 × 387,434.00 - Step 4: Simplify right side
709,786.18x = 379,479,149,848.24 - Step 5: Solve for x
x = 379,479,149,848.24/709,786.18 - Step 6: Final answer
x = 534,638.69
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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.