Finding the Fourth Proportional to 390,816.26, 586,294.60 and 138,243.14
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Solution
The fourth proportional to 390,816.26, 586,294.60 and 138,243.14 is: 207,389.55
Step by Step Solution
- Step 1: Write the proportion equation
390,816.26 : 586,294.60 = 138,243.14 : x - Step 2: Convert to fraction form
390,816.26/586,294.60 = 138,243.14/x - Step 3: Cross multiply
390,816.26x = 586,294.60 × 138,243.14 - Step 4: Simplify right side
390,816.26x = 81,051,206,469.04 - Step 5: Solve for x
x = 81,051,206,469.04/390,816.26 - Step 6: Final answer
x = 207,389.55
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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.