Finding the Fourth Proportional to 256,931.60, 385,378.20 and 107,133.20
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Solution
The fourth proportional to 256,931.60, 385,378.20 and 107,133.20 is: 160,691.79
Step by Step Solution
- Step 1: Write the proportion equation
256,931.60 : 385,378.20 = 107,133.20 : x - Step 2: Convert to fraction form
256,931.60/385,378.20 = 107,133.20/x - Step 3: Cross multiply
256,931.60x = 385,378.20 × 107,133.20 - Step 4: Simplify right side
256,931.60x = 41,286,799,776.24 - Step 5: Solve for x
x = 41,286,799,776.24/256,931.60 - Step 6: Final answer
x = 160,691.79
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1.5x scale
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.