Finding the Fourth Proportional to 639,138.80, 958,706.99 and 372,712.49
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Solution
The fourth proportional to 639,138.80, 958,706.99 and 372,712.49 is: 559,068.02
Step by Step Solution
- Step 1: Write the proportion equation
639,138.80 : 958,706.99 = 372,712.49 : x - Step 2: Convert to fraction form
639,138.80/958,706.99 = 372,712.49/x - Step 3: Cross multiply
639,138.80x = 958,706.99 × 372,712.49 - Step 4: Simplify right side
639,138.80x = 357,322,067,759.03 - Step 5: Solve for x
x = 357,322,067,759.03/639,138.80 - Step 6: Final answer
x = 559,068.02
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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.