Finding the Fourth Proportional to 390,979.60, 586,517.68 and 138,207.96
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Solution
The fourth proportional to 390,979.60, 586,517.68 and 138,207.96 is: 207,329.01
Step by Step Solution
- Step 1: Write the proportion equation
390,979.60 : 586,517.68 = 138,207.96 : x - Step 2: Convert to fraction form
390,979.60/586,517.68 = 138,207.96/x - Step 3: Cross multiply
390,979.60x = 586,517.68 × 138,207.96 - Step 4: Simplify right side
390,979.60x = 81,061,412,056.73 - Step 5: Solve for x
x = 81,061,412,056.73/390,979.60 - Step 6: Final answer
x = 207,329.01
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.