Finding the Fourth Proportional to 1,161,128,931.33, 1,602,306,236.04 and 678,365,628.53
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Solution
The fourth proportional to 1,161,128,931.33, 1,602,306,236.04 and 678,365,628.53 is: 936,114,369.02
Step by Step Solution
- Step 1: Write the proportion equation
1,161,128,931.33 : 1,602,306,236.04 = 678,365,628.53 : x - Step 2: Convert to fraction form
1,161,128,931.33/1,602,306,236.04 = 678,365,628.53/x - Step 3: Cross multiply
1,161,128,931.33x = 1,602,306,236.04 × 678,365,628.53 - Step 4: Simplify right side
1,161,128,931.33x = 1,086,949,476,900,801,536 - Step 5: Solve for x
x = 1,086,949,476,900,801,536/1,161,128,931.33 - Step 6: Final answer
x = 936,114,369.02
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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.