Finding the Fourth Proportional to 487,191.92, 671,991.26 and 317,655.68
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Solution
The fourth proportional to 487,191.92, 671,991.26 and 317,655.68 is: 438,147.33
Step by Step Solution
- Step 1: Write the proportion equation
487,191.92 : 671,991.26 = 317,655.68 : x - Step 2: Convert to fraction form
487,191.92/671,991.26 = 317,655.68/x - Step 3: Cross multiply
487,191.92x = 671,991.26 × 317,655.68 - Step 4: Simplify right side
487,191.92x = 213,461,840,649.36 - Step 5: Solve for x
x = 213,461,840,649.36/487,191.92 - Step 6: Final answer
x = 438,147.33
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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.