Finding the Fourth Proportional to 284,938.13, 393,221.57 and 155,888.79
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Solution
The fourth proportional to 284,938.13, 393,221.57 and 155,888.79 is: 215,130.33
Step by Step Solution
- Step 1: Write the proportion equation
284,938.13 : 393,221.57 = 155,888.79 : x - Step 2: Convert to fraction form
284,938.13/393,221.57 = 155,888.79/x - Step 3: Cross multiply
284,938.13x = 393,221.57 × 155,888.79 - Step 4: Simplify right side
284,938.13x = 61,298,833,969.76 - Step 5: Solve for x
x = 61,298,833,969.76/284,938.13 - Step 6: Final answer
x = 215,130.33
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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.