Finding the Third Proportional to 399,309.75 and 442,639.69
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Solution
The third proportional to 399,309.75 and 442,639.69 is: 490,671.45
Step by Step Solution
- Step 1: Write the proportion equation
399,309.75 : 442,639.69 = 442,639.69 : x - Step 2: Convert to fraction form
399,309.75/442,639.69 = 442,639.69/x - Step 3: Cross multiply
399,309.75x = 442,639.69 × 442,639.69 - Step 4: Simplify right side
399,309.75x = 195,929,892,950.10 - Step 5: Solve for x
x = 195,929,892,950.10/399,309.75 - Step 6: Final answer
x = 490,671.45
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These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.