Finding the Fourth Proportional to 451,008.65, 621,893.20 and 287,405.99
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Solution
The fourth proportional to 451,008.65, 621,893.20 and 287,405.99 is: 396,302.45
Step by Step Solution
- Step 1: Write the proportion equation
451,008.65 : 621,893.20 = 287,405.99 : x - Step 2: Convert to fraction form
451,008.65/621,893.20 = 287,405.99/x - Step 3: Cross multiply
451,008.65x = 621,893.20 × 287,405.99 - Step 4: Simplify right side
451,008.65x = 178,735,830,820.27 - Step 5: Solve for x
x = 178,735,830,820.27/451,008.65 - Step 6: Final answer
x = 396,302.45
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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.