Finding the Fourth Proportional to 718,490.61, 991,540.97 and 391,821.49
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Solution
The fourth proportional to 718,490.61, 991,540.97 and 391,821.49 is: 540,726.70
Step by Step Solution
- Step 1: Write the proportion equation
718,490.61 : 991,540.97 = 391,821.49 : x - Step 2: Convert to fraction form
718,490.61/991,540.97 = 391,821.49/x - Step 3: Cross multiply
718,490.61x = 991,540.97 × 391,821.49 - Step 4: Simplify right side
718,490.61x = 388,507,055,303.74 - Step 5: Solve for x
x = 388,507,055,303.74/718,490.61 - Step 6: Final answer
x = 540,726.70
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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.