Finding the Fourth Proportional to 378,855,389.40, 522,532,349.34 and 326,021,149.02
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Solution
The fourth proportional to 378,855,389.40, 522,532,349.34 and 326,021,149.02 is: 449,661,273.66
Step by Step Solution
- Step 1: Write the proportion equation
378,855,389.40 : 522,532,349.34 = 326,021,149.02 : x - Step 2: Convert to fraction form
378,855,389.40/522,532,349.34 = 326,021,149.02/x - Step 3: Cross multiply
378,855,389.40x = 522,532,349.34 × 326,021,149.02 - Step 4: Simplify right side
378,855,389.40x = 170,356,596,931,946,816 - Step 5: Solve for x
x = 170,356,596,931,946,816/378,855,389.40 - Step 6: Final answer
x = 449,661,273.66
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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.