Finding the Fourth Proportional to 427,992.84, 642,096.06 and 128,478.96
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Solution
The fourth proportional to 427,992.84, 642,096.06 and 128,478.96 is: 192,750.50
Step by Step Solution
- Step 1: Write the proportion equation
427,992.84 : 642,096.06 = 128,478.96 : x - Step 2: Convert to fraction form
427,992.84/642,096.06 = 128,478.96/x - Step 3: Cross multiply
427,992.84x = 642,096.06 × 128,478.96 - Step 4: Simplify right side
427,992.84x = 82,495,834,008.90 - Step 5: Solve for x
x = 82,495,834,008.90/427,992.84 - Step 6: Final answer
x = 192,750.50
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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.