Finding the Fourth Proportional to 858,835,915.80, 1,288,253,873.70 and 398,621,131.80
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Solution
The fourth proportional to 858,835,915.80, 1,288,253,873.70 and 398,621,131.80 is: 597,931,697.70
Step by Step Solution
- Step 1: Write the proportion equation
858,835,915.80 : 1,288,253,873.70 = 398,621,131.80 : x - Step 2: Convert to fraction form
858,835,915.80/1,288,253,873.70 = 398,621,131.80/x - Step 3: Cross multiply
858,835,915.80x = 1,288,253,873.70 × 398,621,131.80 - Step 4: Simplify right side
858,835,915.80x = 513,525,217,180,028,288 - Step 5: Solve for x
x = 513,525,217,180,028,288/858,835,915.80 - Step 6: Final answer
x = 597,931,697.70
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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.