Finding the Fourth Proportional to 422,990.14, 583,865.96 and 378,149.80
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Solution
The fourth proportional to 422,990.14, 583,865.96 and 378,149.80 is: 521,971.50
Step by Step Solution
- Step 1: Write the proportion equation
422,990.14 : 583,865.96 = 378,149.80 : x - Step 2: Convert to fraction form
422,990.14/583,865.96 = 378,149.80/x - Step 3: Cross multiply
422,990.14x = 583,865.96 × 378,149.80 - Step 4: Simplify right side
422,990.14x = 220,788,796,000.81 - Step 5: Solve for x
x = 220,788,796,000.81/422,990.14 - Step 6: Final answer
x = 521,971.50
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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.