Finding the Fourth Proportional to 678,810,691.42, 936,728,549.94 and 396,579,303.70
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Solution
The fourth proportional to 678,810,691.42, 936,728,549.94 and 396,579,303.70 is: 547,261,793.00
Step by Step Solution
- Step 1: Write the proportion equation
678,810,691.42 : 936,728,549.94 = 396,579,303.70 : x - Step 2: Convert to fraction form
678,810,691.42/936,728,549.94 = 396,579,303.70/x - Step 3: Cross multiply
678,810,691.42x = 936,728,549.94 × 396,579,303.70 - Step 4: Simplify right side
678,810,691.42x = 371,487,156,091,115,904 - Step 5: Solve for x
x = 371,487,156,091,115,904/678,810,691.42 - Step 6: Final answer
x = 547,261,793.00
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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.