Finding the Fourth Proportional to 280,831,519.80, 421,247,279.70 and 212,807,071.80
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Solution
The fourth proportional to 280,831,519.80, 421,247,279.70 and 212,807,071.80 is: 319,210,607.70
Step by Step Solution
- Step 1: Write the proportion equation
280,831,519.80 : 421,247,279.70 = 212,807,071.80 : x - Step 2: Convert to fraction form
280,831,519.80/421,247,279.70 = 212,807,071.80/x - Step 3: Cross multiply
280,831,519.80x = 421,247,279.70 × 212,807,071.80 - Step 4: Simplify right side
280,831,519.80x = 89,644,400,096,672,592 - Step 5: Solve for x
x = 89,644,400,096,672,592/280,831,519.80 - Step 6: Final answer
x = 319,210,607.70
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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.