Finding the Fourth Proportional to 387,455.05, 581,018.55 and 121,144.06
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Solution
The fourth proportional to 387,455.05, 581,018.55 and 121,144.06 is: 181,664.80
Step by Step Solution
- Step 1: Write the proportion equation
387,455.05 : 581,018.55 = 121,144.06 : x - Step 2: Convert to fraction form
387,455.05/581,018.55 = 121,144.06/x - Step 3: Cross multiply
387,455.05x = 581,018.55 × 121,144.06 - Step 4: Simplify right side
387,455.05x = 70,386,946,082.31 - Step 5: Solve for x
x = 70,386,946,082.31/387,455.05 - Step 6: Final answer
x = 181,664.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.