Finding the Fourth Proportional to 286,857.18, 430,282.26 and 128,974.14
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Solution
The fourth proportional to 286,857.18, 430,282.26 and 128,974.14 is: 193,459.63
Step by Step Solution
- Step 1: Write the proportion equation
286,857.18 : 430,282.26 = 128,974.14 : x - Step 2: Convert to fraction form
286,857.18/430,282.26 = 128,974.14/x - Step 3: Cross multiply
286,857.18x = 430,282.26 × 128,974.14 - Step 4: Simplify right side
286,857.18x = 55,495,284,440.76 - Step 5: Solve for x
x = 55,495,284,440.76/286,857.18 - Step 6: Final answer
x = 193,459.63
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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.