Finding the Fourth Proportional to 389,799.05, 538,438.94 and 313,605.18
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Solution
The fourth proportional to 389,799.05, 538,438.94 and 313,605.18 is: 433,190.49
Step by Step Solution
- Step 1: Write the proportion equation
389,799.05 : 538,438.94 = 313,605.18 : x - Step 2: Convert to fraction form
389,799.05/538,438.94 = 313,605.18/x - Step 3: Cross multiply
389,799.05x = 538,438.94 × 313,605.18 - Step 4: Simplify right side
389,799.05x = 168,857,239,129.68 - Step 5: Solve for x
x = 168,857,239,129.68/389,799.05 - Step 6: Final answer
x = 433,190.49
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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.