Finding the Fourth Proportional to 413,945,830.80, 620,918,746.20 and 393,790,438.80
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Solution
The fourth proportional to 413,945,830.80, 620,918,746.20 and 393,790,438.80 is: 590,685,658.20
Step by Step Solution
- Step 1: Write the proportion equation
413,945,830.80 : 620,918,746.20 = 393,790,438.80 : x - Step 2: Convert to fraction form
413,945,830.80/620,918,746.20 = 393,790,438.80/x - Step 3: Cross multiply
413,945,830.80x = 620,918,746.20 × 393,790,438.80 - Step 4: Simplify right side
413,945,830.80x = 244,511,865,525,243,872 - Step 5: Solve for x
x = 244,511,865,525,243,872/413,945,830.80 - Step 6: Final answer
x = 590,685,658.20
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.