Finding the Fourth Proportional to 415,318,021.20, 622,977,031.80 and 415,318,021.20
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Solution
The fourth proportional to 415,318,021.20, 622,977,031.80 and 415,318,021.20 is: 622,977,031.80
Step by Step Solution
- Step 1: Write the proportion equation
415,318,021.20 : 622,977,031.80 = 415,318,021.20 : x - Step 2: Convert to fraction form
415,318,021.20/622,977,031.80 = 415,318,021.20/x - Step 3: Cross multiply
415,318,021.20x = 622,977,031.80 × 415,318,021.20 - Step 4: Simplify right side
415,318,021.20x = 258,733,588,100,225,440 - Step 5: Solve for x
x = 258,733,588,100,225,440/415,318,021.20 - Step 6: Final answer
x = 622,977,031.80
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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.