Finding the Fourth Proportional to 280,831,569.30, 421,247,353.95 and 212,807,121.30
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Solution
The fourth proportional to 280,831,569.30, 421,247,353.95 and 212,807,121.30 is: 319,210,681.95
Step by Step Solution
- Step 1: Write the proportion equation
280,831,569.30 : 421,247,353.95 = 212,807,121.30 : x - Step 2: Convert to fraction form
280,831,569.30/421,247,353.95 = 212,807,121.30/x - Step 3: Cross multiply
280,831,569.30x = 421,247,353.95 × 212,807,121.30 - Step 4: Simplify right side
280,831,569.30x = 89,644,436,749,341,680 - Step 5: Solve for x
x = 89,644,436,749,341,680/280,831,569.30 - Step 6: Final answer
x = 319,210,681.95
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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.