Finding the Fourth Proportional to 387,171,639.40, 534,290,135.18 and 210,961,082.70
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Solution
The fourth proportional to 387,171,639.40, 534,290,135.18 and 210,961,082.70 is: 291,122,628.63
Step by Step Solution
- Step 1: Write the proportion equation
387,171,639.40 : 534,290,135.18 = 210,961,082.70 : x - Step 2: Convert to fraction form
387,171,639.40/534,290,135.18 = 210,961,082.70/x - Step 3: Cross multiply
387,171,639.40x = 534,290,135.18 × 210,961,082.70 - Step 4: Simplify right side
387,171,639.40x = 112,714,425,393,502,160 - Step 5: Solve for x
x = 112,714,425,393,502,160/387,171,639.40 - Step 6: Final answer
x = 291,122,628.63
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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.