Finding the Fourth Proportional to 312,156,243.18, 430,744,221.36 and 172,900,986.48
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Solution
The fourth proportional to 312,156,243.18, 430,744,221.36 and 172,900,986.48 is: 238,585,972.32
Step by Step Solution
- Step 1: Write the proportion equation
312,156,243.18 : 430,744,221.36 = 172,900,986.48 : x - Step 2: Convert to fraction form
312,156,243.18/430,744,221.36 = 172,900,986.48/x - Step 3: Cross multiply
312,156,243.18x = 430,744,221.36 × 172,900,986.48 - Step 4: Simplify right side
312,156,243.18x = 74,476,100,793,703,488 - Step 5: Solve for x
x = 74,476,100,793,703,488/312,156,243.18 - Step 6: Final answer
x = 238,585,972.32
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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.