Finding the Fourth Proportional to 644,205.68, 888,974.16 and 357,743.60
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Solution
The fourth proportional to 644,205.68, 888,974.16 and 357,743.60 is: 493,669.69
Step by Step Solution
- Step 1: Write the proportion equation
644,205.68 : 888,974.16 = 357,743.60 : x - Step 2: Convert to fraction form
644,205.68/888,974.16 = 357,743.60/x - Step 3: Cross multiply
644,205.68x = 888,974.16 × 357,743.60 - Step 4: Simplify right side
644,205.68x = 318,024,816,305.38 - Step 5: Solve for x
x = 318,024,816,305.38/644,205.68 - Step 6: Final answer
x = 493,669.69
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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.