Finding the Fourth Proportional to 643,278.76, 887,143.50 and 401,583.68
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Solution
The fourth proportional to 643,278.76, 887,143.50 and 401,583.68 is: 553,822.66
Step by Step Solution
- Step 1: Write the proportion equation
643,278.76 : 887,143.50 = 401,583.68 : x - Step 2: Convert to fraction form
643,278.76/887,143.50 = 401,583.68/x - Step 3: Cross multiply
643,278.76x = 887,143.50 × 401,583.68 - Step 4: Simplify right side
643,278.76x = 356,262,351,418.08 - Step 5: Solve for x
x = 356,262,351,418.08/643,278.76 - Step 6: Final answer
x = 553,822.66
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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.