Finding the Fourth Proportional to 398,660,211.80, 597,990,317.70 and 391,941,747.80
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Solution
The fourth proportional to 398,660,211.80, 597,990,317.70 and 391,941,747.80 is: 587,912,621.70
Step by Step Solution
- Step 1: Write the proportion equation
398,660,211.80 : 597,990,317.70 = 391,941,747.80 : x - Step 2: Convert to fraction form
398,660,211.80/597,990,317.70 = 391,941,747.80/x - Step 3: Cross multiply
398,660,211.80x = 597,990,317.70 × 391,941,747.80 - Step 4: Simplify right side
398,660,211.80x = 234,377,370,286,815,296 - Step 5: Solve for x
x = 234,377,370,286,815,296/398,660,211.80 - Step 6: Final answer
x = 587,912,621.70
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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.