Finding the Fourth Proportional to 387,428.79, 534,661.61 and 212,996.86
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Solution
The fourth proportional to 387,428.79, 534,661.61 and 212,996.86 is: 293,941.09
Step by Step Solution
- Step 1: Write the proportion equation
387,428.79 : 534,661.61 = 212,996.86 : x - Step 2: Convert to fraction form
387,428.79/534,661.61 = 212,996.86/x - Step 3: Cross multiply
387,428.79x = 534,661.61 × 212,996.86 - Step 4: Simplify right side
387,428.79x = 113,881,241,419.24 - Step 5: Solve for x
x = 113,881,241,419.24/387,428.79 - Step 6: Final answer
x = 293,941.09
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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.