Finding the Fourth Proportional to 276,639.06, 381,758.12 and 155,781.80
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Solution
The fourth proportional to 276,639.06, 381,758.12 and 155,781.80 is: 214,976.75
Step by Step Solution
- Step 1: Write the proportion equation
276,639.06 : 381,758.12 = 155,781.80 : x - Step 2: Convert to fraction form
276,639.06/381,758.12 = 155,781.80/x - Step 3: Cross multiply
276,639.06x = 381,758.12 × 155,781.80 - Step 4: Simplify right side
276,639.06x = 59,470,967,098.22 - Step 5: Solve for x
x = 59,470,967,098.22/276,639.06 - Step 6: Final answer
x = 214,976.75
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1.5x scale
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.