Finding the Fourth Proportional to 716,961.38, 989,442.21 and 394,668.05
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Solution
The fourth proportional to 716,961.38, 989,442.21 and 394,668.05 is: 544,661.45
Step by Step Solution
- Step 1: Write the proportion equation
716,961.38 : 989,442.21 = 394,668.05 : x - Step 2: Convert to fraction form
716,961.38/989,442.21 = 394,668.05/x - Step 3: Cross multiply
716,961.38x = 989,442.21 × 394,668.05 - Step 4: Simplify right side
716,961.38x = 390,501,222,661.18 - Step 5: Solve for x
x = 390,501,222,661.18/716,961.38 - Step 6: Final answer
x = 544,661.45
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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.