Finding the Fourth Proportional to 390,231.26, 585,402.70 and 120,382.20
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Solution
The fourth proportional to 390,231.26, 585,402.70 and 120,382.20 is: 180,590.52
Step by Step Solution
- Step 1: Write the proportion equation
390,231.26 : 585,402.70 = 120,382.20 : x - Step 2: Convert to fraction form
390,231.26/585,402.70 = 120,382.20/x - Step 3: Cross multiply
390,231.26x = 585,402.70 × 120,382.20 - Step 4: Simplify right side
390,231.26x = 70,472,064,911.94 - Step 5: Solve for x
x = 70,472,064,911.94/390,231.26 - Step 6: Final answer
x = 180,590.52
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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.