Finding the Fourth Proportional to 643,461.87, 887,989.11 and 353,088.41
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Solution
The fourth proportional to 643,461.87, 887,989.11 and 353,088.41 is: 487,268.44
Step by Step Solution
- Step 1: Write the proportion equation
643,461.87 : 887,989.11 = 353,088.41 : x - Step 2: Convert to fraction form
643,461.87/887,989.11 = 353,088.41/x - Step 3: Cross multiply
643,461.87x = 887,989.11 × 353,088.41 - Step 4: Simplify right side
643,461.87x = 313,538,662,947.22 - Step 5: Solve for x
x = 313,538,662,947.22/643,461.87 - Step 6: Final answer
x = 487,268.44
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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.