Finding the Fourth Proportional to 316,213.49, 436,368.88 and 172,972.28
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Solution
The fourth proportional to 316,213.49, 436,368.88 and 172,972.28 is: 238,698.61
Step by Step Solution
- Step 1: Write the proportion equation
316,213.49 : 436,368.88 = 172,972.28 : x - Step 2: Convert to fraction form
316,213.49/436,368.88 = 172,972.28/x - Step 3: Cross multiply
316,213.49x = 436,368.88 × 172,972.28 - Step 4: Simplify right side
316,213.49x = 75,479,720,094.65 - Step 5: Solve for x
x = 75,479,720,094.65/316,213.49 - Step 6: Final answer
x = 238,698.61
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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.