Finding the Fourth Proportional to 455,310.71, 628,381.91 and 378,694.63
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Solution
The fourth proportional to 455,310.71, 628,381.91 and 378,694.63 is: 522,642.78
Step by Step Solution
- Step 1: Write the proportion equation
455,310.71 : 628,381.91 = 378,694.63 : x - Step 2: Convert to fraction form
455,310.71/628,381.91 = 378,694.63/x - Step 3: Cross multiply
455,310.71x = 628,381.91 × 378,694.63 - Step 4: Simplify right side
455,310.71x = 237,964,854,281.93 - Step 5: Solve for x
x = 237,964,854,281.93/455,310.71 - Step 6: Final answer
x = 522,642.78
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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.