Finding the Fourth Proportional to 415,969.40, 623,954.10 and 399,639.80
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Solution
The fourth proportional to 415,969.40, 623,954.10 and 399,639.80 is: 599,459.70
Step by Step Solution
- Step 1: Write the proportion equation
415,969.40 : 623,954.10 = 399,639.80 : x - Step 2: Convert to fraction form
415,969.40/623,954.10 = 399,639.80/x - Step 3: Cross multiply
415,969.40x = 623,954.10 × 399,639.80 - Step 4: Simplify right side
415,969.40x = 249,356,891,733.18 - Step 5: Solve for x
x = 249,356,891,733.18/415,969.40 - Step 6: Final answer
x = 599,459.70
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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.