Finding the Fourth Proportional to 280,831,570.30, 421,247,355.45 and 212,807,122.30
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Solution
The fourth proportional to 280,831,570.30, 421,247,355.45 and 212,807,122.30 is: 319,210,683.45
Step by Step Solution
- Step 1: Write the proportion equation
280,831,570.30 : 421,247,355.45 = 212,807,122.30 : x - Step 2: Convert to fraction form
280,831,570.30/421,247,355.45 = 212,807,122.30/x - Step 3: Cross multiply
280,831,570.30x = 421,247,355.45 × 212,807,122.30 - Step 4: Simplify right side
280,831,570.30x = 89,644,437,489,799,728 - Step 5: Solve for x
x = 89,644,437,489,799,728/280,831,570.30 - Step 6: Final answer
x = 319,210,683.45
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1.5x scale
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.