Finding the Fourth Proportional to 690,709.84, 1,036,204.90 and 217,285.09
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Solution
The fourth proportional to 690,709.84, 1,036,204.90 and 217,285.09 is: 325,971.72
Step by Step Solution
- Step 1: Write the proportion equation
690,709.84 : 1,036,204.90 = 217,285.09 : x - Step 2: Convert to fraction form
690,709.84/1,036,204.90 = 217,285.09/x - Step 3: Cross multiply
690,709.84x = 1,036,204.90 × 217,285.09 - Step 4: Simplify right side
690,709.84x = 225,151,874,954.94 - Step 5: Solve for x
x = 225,151,874,954.94/690,709.84 - Step 6: Final answer
x = 325,971.72
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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.