Finding the Fourth Proportional to 316,639.20, 474,958.80 and 129,784.80
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Solution
The fourth proportional to 316,639.20, 474,958.80 and 129,784.80 is: 194,677.20
Step by Step Solution
- Step 1: Write the proportion equation
316,639.20 : 474,958.80 = 129,784.80 : x - Step 2: Convert to fraction form
316,639.20/474,958.80 = 129,784.80/x - Step 3: Cross multiply
316,639.20x = 474,958.80 × 129,784.80 - Step 4: Simplify right side
316,639.20x = 61,642,432,866.24 - Step 5: Solve for x
x = 61,642,432,866.24/316,639.20 - Step 6: Final answer
x = 194,677.20
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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.