Finding the Fourth Proportional to 282,699.81, 390,133.17 and 155,378.79
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Solution
The fourth proportional to 282,699.81, 390,133.17 and 155,378.79 is: 214,426.82
Step by Step Solution
- Step 1: Write the proportion equation
282,699.81 : 390,133.17 = 155,378.79 : x - Step 2: Convert to fraction form
282,699.81/390,133.17 = 155,378.79/x - Step 3: Cross multiply
282,699.81x = 390,133.17 × 155,378.79 - Step 4: Simplify right side
282,699.81x = 60,618,419,893.46 - Step 5: Solve for x
x = 60,618,419,893.46/282,699.81 - Step 6: Final answer
x = 214,426.82
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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.