Finding the Fourth Proportional to 858,512,270.40, 1,287,768,405.60 and 212,280,014.40
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Solution
The fourth proportional to 858,512,270.40, 1,287,768,405.60 and 212,280,014.40 is: 318,420,021.60
Step by Step Solution
- Step 1: Write the proportion equation
858,512,270.40 : 1,287,768,405.60 = 212,280,014.40 : x - Step 2: Convert to fraction form
858,512,270.40/1,287,768,405.60 = 212,280,014.40/x - Step 3: Cross multiply
858,512,270.40x = 1,287,768,405.60 × 212,280,014.40 - Step 4: Simplify right side
858,512,270.40x = 273,367,495,684,633,024 - Step 5: Solve for x
x = 273,367,495,684,633,024/858,512,270.40 - Step 6: Final answer
x = 318,420,021.60
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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.