Finding the Fourth Proportional to 278,639.05, 384,639.59 and 188,117.62
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Solution
The fourth proportional to 278,639.05, 384,639.59 and 188,117.62 is: 259,681.78
Step by Step Solution
- Step 1: Write the proportion equation
278,639.05 : 384,639.59 = 188,117.62 : x - Step 2: Convert to fraction form
278,639.05/384,639.59 = 188,117.62/x - Step 3: Cross multiply
278,639.05x = 384,639.59 × 188,117.62 - Step 4: Simplify right side
278,639.05x = 72,357,484,228.58 - Step 5: Solve for x
x = 72,357,484,228.58/278,639.05 - Step 6: Final answer
x = 259,681.78
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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.