Finding the Fourth Proportional to 398,512,521.96, 549,950,859.63 and 219,904,354.05
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Solution
The fourth proportional to 398,512,521.96, 549,950,859.63 and 219,904,354.05 is: 303,469,983.71
Step by Step Solution
- Step 1: Write the proportion equation
398,512,521.96 : 549,950,859.63 = 219,904,354.05 : x - Step 2: Convert to fraction form
398,512,521.96/549,950,859.63 = 219,904,354.05/x - Step 3: Cross multiply
398,512,521.96x = 549,950,859.63 × 219,904,354.05 - Step 4: Simplify right side
398,512,521.96x = 120,936,588,546,177,376 - Step 5: Solve for x
x = 120,936,588,546,177,376/398,512,521.96 - Step 6: Final answer
x = 303,469,983.71
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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.