Finding the Fourth Proportional to 643,239.60, 887,612.49 and 356,758.80
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Solution
The fourth proportional to 643,239.60, 887,612.49 and 356,758.80 is: 492,294.89
Step by Step Solution
- Step 1: Write the proportion equation
643,239.60 : 887,612.49 = 356,758.80 : x - Step 2: Convert to fraction form
643,239.60/887,612.49 = 356,758.80/x - Step 3: Cross multiply
643,239.60x = 887,612.49 × 356,758.80 - Step 4: Simplify right side
643,239.60x = 316,663,566,797.41 - Step 5: Solve for x
x = 316,663,566,797.41/643,239.60 - Step 6: Final answer
x = 492,294.89
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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.