Finding the Fourth Proportional to 681,351,848.64, 1,021,991,031.36 and 390,037,150.08
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Solution
The fourth proportional to 681,351,848.64, 1,021,991,031.36 and 390,037,150.08 is: 585,034,692.54
Step by Step Solution
- Step 1: Write the proportion equation
681,351,848.64 : 1,021,991,031.36 = 390,037,150.08 : x - Step 2: Convert to fraction form
681,351,848.64/1,021,991,031.36 = 390,037,150.08/x - Step 3: Cross multiply
681,351,848.64x = 1,021,991,031.36 × 390,037,150.08 - Step 4: Simplify right side
681,351,848.64x = 398,614,469,278,974,272 - Step 5: Solve for x
x = 398,614,469,278,974,272/681,351,848.64 - Step 6: Final answer
x = 585,034,692.54
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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.