Finding the Fourth Proportional to 276,478.79, 381,499.17 and 155,612.88
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Solution
The fourth proportional to 276,478.79, 381,499.17 and 155,612.88 is: 214,722.39
Step by Step Solution
- Step 1: Write the proportion equation
276,478.79 : 381,499.17 = 155,612.88 : x - Step 2: Convert to fraction form
276,478.79/381,499.17 = 155,612.88/x - Step 3: Cross multiply
276,478.79x = 381,499.17 × 155,612.88 - Step 4: Simplify right side
276,478.79x = 59,366,184,561.31 - Step 5: Solve for x
x = 59,366,184,561.31/276,478.79 - Step 6: Final answer
x = 214,722.39
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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.