Finding the Fourth Proportional to 623,990.36, 861,631.60 and 394,951.70
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Solution
The fourth proportional to 623,990.36, 861,631.60 and 394,951.70 is: 545,365.57
Step by Step Solution
- Step 1: Write the proportion equation
623,990.36 : 861,631.60 = 394,951.70 : x - Step 2: Convert to fraction form
623,990.36/861,631.60 = 394,951.70/x - Step 3: Cross multiply
623,990.36x = 861,631.60 × 394,951.70 - Step 4: Simplify right side
623,990.36x = 340,302,859,898.18 - Step 5: Solve for x
x = 340,302,859,898.18/623,990.36 - Step 6: Final answer
x = 545,365.57
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1.5x scale
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.