Finding the Fourth Proportional to 286,639.08, 430,131.42 and 99,781.80
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Solution
The fourth proportional to 286,639.08, 430,131.42 and 99,781.80 is: 149,732.85
Step by Step Solution
- Step 1: Write the proportion equation
286,639.08 : 430,131.42 = 99,781.80 : x - Step 2: Convert to fraction form
286,639.08/430,131.42 = 99,781.80/x - Step 3: Cross multiply
286,639.08x = 430,131.42 × 99,781.80 - Step 4: Simplify right side
286,639.08x = 42,919,287,324.16 - Step 5: Solve for x
x = 42,919,287,324.16/286,639.08 - Step 6: Final answer
x = 149,732.85
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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.