Finding the Fourth Proportional to 279,879.80, 385,928.87 and 189,078.08
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Solution
The fourth proportional to 279,879.80, 385,928.87 and 189,078.08 is: 260,721.52
Step by Step Solution
- Step 1: Write the proportion equation
279,879.80 : 385,928.87 = 189,078.08 : x - Step 2: Convert to fraction form
279,879.80/385,928.87 = 189,078.08/x - Step 3: Cross multiply
279,879.80x = 385,928.87 × 189,078.08 - Step 4: Simplify right side
279,879.80x = 72,970,686,881.13 - Step 5: Solve for x
x = 72,970,686,881.13/279,879.80 - Step 6: Final answer
x = 260,721.52
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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.