Finding the Fourth Proportional to 647,354,138.40, 971,031,207.60 and 642,819,175.20
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Solution
The fourth proportional to 647,354,138.40, 971,031,207.60 and 642,819,175.20 is: 964,228,762.80
Step by Step Solution
- Step 1: Write the proportion equation
647,354,138.40 : 971,031,207.60 = 642,819,175.20 : x - Step 2: Convert to fraction form
647,354,138.40/971,031,207.60 = 642,819,175.20/x - Step 3: Cross multiply
647,354,138.40x = 971,031,207.60 × 642,819,175.20 - Step 4: Simplify right side
647,354,138.40x = 624,197,479,962,892,032 - Step 5: Solve for x
x = 624,197,479,962,892,032/647,354,138.40 - Step 6: Final answer
x = 964,228,762.80
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Double scale
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Similar ratio
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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.