Finding the Fourth Proportional to 687,826,092.85, 949,175,072.97 and 420,349,414.08
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Solution
The fourth proportional to 687,826,092.85, 949,175,072.97 and 420,349,414.08 is: 580,066,952.87
Step by Step Solution
- Step 1: Write the proportion equation
687,826,092.85 : 949,175,072.97 = 420,349,414.08 : x - Step 2: Convert to fraction form
687,826,092.85/949,175,072.97 = 420,349,414.08/x - Step 3: Cross multiply
687,826,092.85x = 949,175,072.97 × 420,349,414.08 - Step 4: Simplify right side
687,826,092.85x = 398,985,185,782,280,768 - Step 5: Solve for x
x = 398,985,185,782,280,768/687,826,092.85 - Step 6: Final answer
x = 580,066,952.87
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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.