Finding the Fourth Proportional to 378,918.84, 522,948.78 and 283,261.08
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Solution
The fourth proportional to 378,918.84, 522,948.78 and 283,261.08 is: 390,930.78
Step by Step Solution
- Step 1: Write the proportion equation
378,918.84 : 522,948.78 = 283,261.08 : x - Step 2: Convert to fraction form
378,918.84/522,948.78 = 283,261.08/x - Step 3: Cross multiply
378,918.84x = 522,948.78 × 283,261.08 - Step 4: Simplify right side
378,918.84x = 148,131,036,207.48 - Step 5: Solve for x
x = 148,131,036,207.48/378,918.84 - Step 6: Final answer
x = 390,930.78
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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.