Finding the Fourth Proportional to 387,775,770.12, 535,129,804.53 and 211,563,884.88
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Solution
The fourth proportional to 387,775,770.12, 535,129,804.53 and 211,563,884.88 is: 291,957,747.45
Step by Step Solution
- Step 1: Write the proportion equation
387,775,770.12 : 535,129,804.53 = 211,563,884.88 : x - Step 2: Convert to fraction form
387,775,770.12/535,129,804.53 = 211,563,884.88/x - Step 3: Cross multiply
387,775,770.12x = 535,129,804.53 × 211,563,884.88 - Step 4: Simplify right side
387,775,770.12x = 113,214,140,361,441,808 - Step 5: Solve for x
x = 113,214,140,361,441,808/387,775,770.12 - Step 6: Final answer
x = 291,957,747.45
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.