Finding the Fourth Proportional to 393,364,811.56, 542,829,205.36 and 217,149,022.12
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Solution
The fourth proportional to 393,364,811.56, 542,829,205.36 and 217,149,022.12 is: 299,657,792.61
Step by Step Solution
- Step 1: Write the proportion equation
393,364,811.56 : 542,829,205.36 = 217,149,022.12 : x - Step 2: Convert to fraction form
393,364,811.56/542,829,205.36 = 217,149,022.12/x - Step 3: Cross multiply
393,364,811.56x = 542,829,205.36 × 217,149,022.12 - Step 4: Simplify right side
393,364,811.56x = 117,874,831,122,100,672 - Step 5: Solve for x
x = 117,874,831,122,100,672/393,364,811.56 - Step 6: Final answer
x = 299,657,792.61
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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.