Finding the Fourth Proportional to 643,207.68, 887,669.28 and 356,739.84
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Solution
The fourth proportional to 643,207.68, 887,669.28 and 356,739.84 is: 492,324.65
Step by Step Solution
- Step 1: Write the proportion equation
643,207.68 : 887,669.28 = 356,739.84 : x - Step 2: Convert to fraction form
643,207.68/887,669.28 = 356,739.84/x - Step 3: Cross multiply
643,207.68x = 887,669.28 × 356,739.84 - Step 4: Simplify right side
643,207.68x = 316,666,996,920.12 - Step 5: Solve for x
x = 316,666,996,920.12/643,207.68 - Step 6: Final answer
x = 492,324.65
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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.