Finding the Fourth Proportional to 319,198,390.42, 440,493,579.82 and 172,520,674.42
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Solution
The fourth proportional to 319,198,390.42, 440,493,579.82 and 172,520,674.42 is: 238,078,423.17
Step by Step Solution
- Step 1: Write the proportion equation
319,198,390.42 : 440,493,579.82 = 172,520,674.42 : x - Step 2: Convert to fraction form
319,198,390.42/440,493,579.82 = 172,520,674.42/x - Step 3: Cross multiply
319,198,390.42x = 440,493,579.82 × 172,520,674.42 - Step 4: Simplify right side
319,198,390.42x = 75,994,249,468,226,496 - Step 5: Solve for x
x = 75,994,249,468,226,496/319,198,390.42 - Step 6: Final answer
x = 238,078,423.17
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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.