Finding the Fourth Proportional to 645,195.87, 890,420.18 and 387,082.49
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Solution
The fourth proportional to 645,195.87, 890,420.18 and 387,082.49 is: 534,203.75
Step by Step Solution
- Step 1: Write the proportion equation
645,195.87 : 890,420.18 = 387,082.49 : x - Step 2: Convert to fraction form
645,195.87/890,420.18 = 387,082.49/x - Step 3: Cross multiply
645,195.87x = 890,420.18 × 387,082.49 - Step 4: Simplify right side
645,195.87x = 344,666,054,033.14 - Step 5: Solve for x
x = 344,666,054,033.14/645,195.87 - Step 6: Final answer
x = 534,203.75
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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.